| Oracle® Spatial GeoRaster 10g Release 2 (10.2) Part Number B14254-02 |
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| Oracle® Spatial GeoRaster 10g Release 2 (10.2) Part Number B14254-02 |
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|
View PDF |
The MDSYS.SDO_GEOR package contains subprograms (functions and procedures) for creating, modifying, and retrieving information about GeoRaster objects. This chapter presents reference information, with one or more examples, for each subprogram.
The subprograms are presented in alphabetical order in this chapter. They can be grouped into several logical categories, as explained in Section 1.9. Many of the subprograms are also discussed in Chapter 3, "GeoRaster Operations".
Many examples in this chapter refer to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
All SDO_GEOR subprograms can work on GeoRaster objects defined in schemas other than the current connection schema.
Format
SDO_GEOR.calcCompressionRatio(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the compression ratio of a specified GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The compression ratio is the sum of the sizes of all raster blocks (including pyramids) in the uncompressed GeoRaster object divided by the sum of these sizes in the compressed form of the object. If the input GeoRaster object is not compressed, the compression ratio is 1 (that is, 1:1).
For a given original GeoRaster object, the greater the compression ratio, the smaller is the compressed GeoRaster object. For example, a compression ratio of 20 (that is, 20:1), the data is compressed to 5 percent of its original size.
For more information about GeoRaster compression, see Section 1.8.
Examples
The following example returns the compression type and compression ratio for the GeoRaster object in the GEORASTER column of table GEORASTER_TABLE where the GEORID column value is 1.
SELECT sdo_geor.getCompressionType(georaster) compType,
sdo_geor.calcCompressionRatio(georaster) compRatio
FROM georaster_table WHERE georid=1;
Format
SDO_GEOR.changeCellValue(
georaster IN OUT SDO_GEORASTER,
window IN SDO_NUMBER_ARRAY,
bandNumbers IN VARCHAR2,
newCellValue IN NUMBER);
or
SDO_GEOR.changeCellValue(
georaster IN OUT SDO_GEORASTER,
window IN SDO_GEOMETRY,
layerNumbers IN VARCHAR2,
newCellValue IN NUMBER);
Description
Changes the value of raster cells in a specified window of a GeoRaster object to a single new value.
Parameters
GeoRaster object.
Window in which to change the values of all cells to newCellValue. The data type can be SDO_NUMBER_ARRAY or SDO_GEOMETRY. If the data type is SDO_NUMBER_ARRAY, the parameter identifies the upper-left (row, column) and lower-right (row, column) coordinates of a rectangular window, and raster space is assumed. If the data type is SDO_GEOMETRY, see the Usage Notes for SDO_SRID requirements and other information.
A string identifying the physical band numbers on which the operation is to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 1-3 for bands 1, 2, and 3).
A string identifying the logical layer numbers on which the operation is to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 2-4 for layers 2, 3, and 4).
The new cell value for each cell inside the window in the specified bands or layers. The value must be in the range designated by the cellDepth value for the GeoRaster object.
Usage Notes
Because this procedure overwrites data in the input GeoRaster object, you should make a copy of the original GeoRaster object and use this procedure on the copied object. After you are satisfied with the result of this procedure, you can discard the original GeoRaster object if you wish.
This procedure can be used to mask, or conceal, parts of an image. For example, you can change irrelevant parts of an image to a dull color before displaying the image, to help people to focus on the relevant parts.
If the window parameter data type is SDO_GEOMETRY, the SDO_SRID value must be one of the following:
Null, to specify raster space
A value from the SRID column of the MDSYS.CS_SRS table
If the SDO_SRID values for the window parameter geometry and the model space are different, the window parameter geometry is automatically transformed to the coordinate system of the model space before the operation is performed. (Raster space and model space are explained in Section 1.3.)
If the window parameter specifies a nonrectangular SDO_GEOMETRY object, this function calculates the MBR of the geometry and update the cells inside that MBR, including the cells on the boundary of the MBR.
If georaster is a blank GeoRaster object and the whole area is updated, the result is a blank GeoRaster object with the blankCellValue value set to newCellValue.
If georaster is a blank GeoRaster object and it is only partially updated, the result is a nonblank GeoRaster object with the original blankCellValue and newCellValue values set according to the window parameter and the bandNumbers or layerNumbers parameter.
If georaster is a nonblank GeoRaster object, the result is a nonblank GeoRaster object, even if all cells are set to the newCellValue value.
If georaster is null, this procedure performs no operation. If georaster is invalid, an exception is raised.
If any pyramids are defined on the GeoRaster object, the corresponding cell values for the pyramids are updated.
To return the value of a single cell located anywhere in the GeoRaster object, use the SDO_GEOR.getCellValue function.
Examples
The following example changes the value of all cells to 151 in a specified window in band number 1. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE gr sdo_georaster; BEGIN SELECT georaster INTO gr FROM georaster_table WHERE georid=110 FOR UPDATE; sdo_geor.changeCellValue(gr, sdo_number_array(100,67,134,113), '1', 151); UPDATE georaster_table SET georaster=gr WHERE georid=110; COMMIT; END; /
Format
SDO_GEOR.changeFormat(
georaster IN OUT SDO_GEORASTER,
storageParam IN VARCHAR2);
Description
Changes the storage format of an existing GeoRaster object (for example, changing the blocking, cell depth, or interleaving).
Note:
This procedure is deprecated. Instead, use the SDO_GEOR.changeFormatCopy procedure, which makes a copy of an existing GeoRaster object using a different storage format.Parameters
The SDO_GEORASTER object whose format is to be changed.
A string specifying storage parameters, as explained in Section 1.4.1. However, the compression keyword is not supported in the storageParam parameter for this procedure, while it is supported for the SDO_GEOR.changeFormatCopy procedure.
Usage Notes
This procedure, which changes the input GeoRaster object, is deprecated and will not be supported in a future release of Spatial. Instead, use the SDO_GEOR.changeFormatCopy procedure. After you use the SDO_GEOR.changeFormatCopy procedure, you can check to ensure that the desired changes were made in the copy of the original GeoRaster object, and then discard the original GeoRaster object if you wish.
If georaster is null, this procedure performs no operation.
An exception is raised if georaster is invalid.
Examples
The following example changes the interleaving type of a GeoRaster object to BIL. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
BEGIN
SELECT georaster INTO gr1 from georaster_table WHERE georid=11 FOR UPDATE;
sdo_geor.changeFormat(gr1, 'interleaving=BIL');
UPDATE georaster_table SET georaster=gr1 WHERE georid=11;
COMMIT;
END;
/
Format
SDO_GEOR.changeFormatCopy(
inGeoraster IN SDO_GEORASTER,
storageParam IN VARCHAR2,
outGeoraster IN OUT SDO_GEORASTER);
Description
Makes a copy of an existing GeoRaster object using a different storage format (for example, changing the blocking, cell depth, or interleaving).
Parameters
The SDO_GEORASTER object whose format is to be copied.
A string specifying storage parameters, as explained in Section 1.4.1.
The SDO_GEORASTER object to hold the copy.
Usage Notes
This procedure does not change the input GeoRaster object, but creates a new GeoRaster object that has the specified changes. After you use this procedure, you can check to ensure that the desired changes were made in the copy of the original GeoRaster object, and then discard the original GeoRaster object if you wish.
To compress or decompress a GeoRaster object, use the compression keyword in the storageParam parameter. (There is no separate GeoRaster function or procedure for compressing or decompressing a GeoRaster object.)
If inGeoraster is null, this procedure performs no operation.
If storageParam is null, inGeoraster is copied to outGeoraster.
If outGeoraster has any raster data, it is deleted before the copy operation.
If pyramid data exists for inGeoraster, the pyramid data is copied to outGeoraster unless the storageParam string contains pyramid=FALSE.
An exception is raised if one or more of the following are true:
inGeoraster is invalid.
outGeoraster has not been initialized.
A raster data table for outGeoraster does not exist and outGeoraster is not a blank GeoRaster object.
Examples
The following example creates a GeoRaster object that is the same as the input object except that the block size is set to 2048 for both dimensions. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
gr2 sdo_georaster;
BEGIN
SELECT georaster INTO gr2 from georaster_table WHERE georid=11 FOR UPDATE;
SELECT georaster INTO gr1 from georaster_table WHERE georid=1;
sdo_geor.changeFormatCopy(gr1, 'blocksize=(2048,2048)', gr2);
UPDATE georaster_table SET georaster=gr2 WHERE georid=11;
COMMIT;
END;
/
Format
SDO_GEOR.copy(
inGeoraster IN SDO_GEORASTER,
outGeoraster IN OUT SDO_GEORASTER);
Description
Makes a copy of an existing GeoRaster object.
Parameters
GeoRaster object to be copied.
GeoRaster object to hold the result of the copy operation.
Usage Notes
The outGeoraster object is an exact copy of the inGeoraster object. To make any changes to the output GeoRaster object during a copy operation, use the SDO_GEOR.changeFormatCopy procedure.
If inGeoraster is null, this procedure performs no operation.
If outGeoraster has any raster data, it is deleted before the copy operation.
If pyramid data exists for inGeoraster, the pyramid data is copied to outGeoraster.
An exception is raised if one or more of the following are true:
inGeoraster is invalid.
outGeoraster has not been initialized.
A raster data table for outGeoraster does not exist and outGeoraster is not a blank GeoRaster object.
Examples
The following example inserts an initialized GeoRaster object (gr2) into the GEORASTER column of table GEORASTER_TABLE, makes gr2 an exact copy of another GeoRaster object (gr1), and updates the row that had been inserted using gr2 for the GEORASTER column value. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
gr2 sdo_georaster;
BEGIN
INSERT INTO georaster_table VALUES (11, sdo_geor.init('RDT_11', 1))
RETURNING georaster INTO gr2;
SELECT georaster INTO gr1 from georaster_table WHERE georid=1;
sdo_geor.copy(gr1, gr2);
UPDATE georaster_table SET georaster=gr2 WHERE georid=11;
COMMIT;
END;
/
Format
SDO_GEOR.createBlank(
rasterType IN INTEGER,
ultCoord IN SDO_NUMBER_ARRAY,
dimSizes IN SDO_NUMBER_ARRAY,
cellValue IN NUMBER,
rasterDataTable IN VARCHAR2 DEFAULT NULL,
rasterID IN NUMBER DEFAULT NULL
) RETURN SDO_GEORASTER;
Description
Creates a blank GeoRaster object, in which all cells have the same value.
Parameters
The 5-digit rasterType attribute value, as specified in Section 2.1.1.
An array of the upper-left coordinate integer values for the GeoRaster object. The default value is (0,0) for a GeoRaster object without a band dimension, and (0,0,0) for a GeoRaster object with a band dimension. If this parameter is null, the default value of 0 is used for each dimension. If a value in the specified array is null, the default value of 0 is used for the corresponding dimension. The value for the band dimension must be 0, and you do not need to specify it. (If you specify an array of values, the number of values must not be less than the number of the spatial dimensions or more than the number of total dimensions.)
The number of cells along each dimension. The number of values in the array must be equal to the total number of dimensions, and the size of each dimension must be explicitly specified. The row and column dimension sizes must be greater than 1.
The cell value for all raster cells in the created GeoRaster object. Must be from 0 to 255, because the cell depth of the created GeoRaster object is 8BIT_UNSIGNED.
Name of the object table of type SDO_RASTER that stores the cell data blocks. If you do not specify this parameter, GeoRaster generates a unique table name to be used for the raster data table. If you specify this parameter and the table already exists but is not an object table of type SDO_RASTER, an exception is raised.
Number that uniquely identifies the cell blocks of this GeoRaster object in the raster data table. If you do not specify this parameter, a unique sequence number is generated for the ID.
Usage Notes
The created GeoRaster object has no spatial reference information; therefore, its spatial extent geometry has a null SRID (coordinate system) value. The spatial extent geometry reflects the ultCoord and dimSizes values.
This function does not require that the specified raster data table exist. However, the table must exist before any raster data can be inserted into it.
Although the cell depth of the created GeoRaster object is 8BIT_UNSIGNED, you can change the cell depth after you create the blank GeoRaster object by calling the SDO_GEOR.changeFormatCopy procedure. You can then call the SDO_GEOR.setBlankCellValue procedure to reset the cell value in a different range.
For guidelines that apply to the SDO_GEOR.createBlank and SDO_GEOR.init functions when a table has multiple GeoRaster object columns, see the Usage Notes for the SDO_GEOR.init function.
An exception is raised if any value for an input parameter is invalid.
Examples
The following example inserts a row containing a blank GeoRaster object into the table. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
INSERT INTO georaster_table (georid, georaster) VALUES (
1,
sdo_geor.createBlank(20001, SDO_NUMBER_ARRAY(0,0),
SDO_NUMBER_ARRAY(1024,1024), 255, 'RDT_1')
);
Format
SDO_GEOR.deletePyramid(
georaster IN OUT SDO_GEORASTER);
Description
Deletes the pyramid data of a GeoRaster object.
Parameters
GeoRaster object for which pyramid data is to be deleted.
Usage Notes
For information about pyramid data, see Section 1.7.
If georaster is null or has no pyramid data, this procedure performs no operation.
An exception is raised if georaster is invalid.
Examples
The following example deletes the pyramid data for a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE gr1 sdo_georaster; BEGIN SELECT georaster INTO gr1 FROM georaster_table WHERE georid=21; sdo_geor.deletePyramid(gr1); UPDATE georaster_table SET georaster=gr1 WHERE georid=21; COMMIT; END; /
Format
SDO_GEOR.exportTo(
georaster IN SDO_GEORASTER,
subsetParam IN VARCHAR2,
r_destFormat IN VARCHAR2,
r_destType IN VARCHAR2,
r_destName IN VARCHAR2,
h_destFormat IN VARCHAR2 DEFAULT NULL,
h_destType IN VARCHAR2 DEFAULT NULL,
h_destName IN VARCHAR2 DEFAULT NULL);
or
SDO_GEOR.exportTo(
georaster IN SDO_GEORASTER,
subsetParam IN VARCHAR2,
r_destFormat IN VARCHAR2,
r_destBLOB IN BLOB);
or
SDO_GEOR.exportTo(
georaster IN SDO_GEORASTER,
subsetParam IN VARCHAR2,
r_destFormat IN VARCHAR2,
r_destBLOB IN BLOB,
h_destFormat IN VARCHAR2 DEFAULT NULL,
h_destCLOB IN CLOB DEFAULT NULL);
Description
Exports a GeoRaster object or a subset of a GeoRaster object to a file or to a BLOB object.
Parameters
GeoRaster object that will be exported.
String containing subset parameters, for exporting a subset of the GeoRaster object. The format and usage are as explained in Section 1.4.1, although some keywords described in that section do not apply to this procedure. The following keywords are supported:
pLevel: Pyramid level to be exported. The default is 0.
cropArea: Specify the area to be exported in the format cropArea = (startCol, startRow, endCol, endRow). startCol is the index of the leftmost pixel to be exported relative to the original image; startRow is the index of the top pixel to be exported; endCol is the index of the rightmost pixel to be exported; and endRow is the index of the bottom pixel to be exported. If cropArea is not specified, the entire image is exported.
layerNumbers: Layer numbers of the layers to be exported. For example, layerNumbers=(3-5) exports layers 3, 4, and 5; and layerNumbers=(1,3,5) exports layers 1, 3, and 5.
Raster destination format. Must be one of the following: TIFF, BMP, or PNG. (JPEG and GIF are not supported for this procedure.)
Type of destination for the export operation. Must be FILE.
Destination file name (with full path specification) if destType is FILE. Do not specify the file extension. If you are using this procedure only to export the world file, specify a null value for this parameter.
BLOB object to hold the image file resulting from the export operation.
Geoheader destination format. Must be WORLDFILE.
Geoheader type of destination for the export operation. Must be FILE.
Geoheader destination file name (with full path specification) if h_destType is FILE. Do not specify the file extension.
CLOB object to hold the geoheader file resulting from the export operation.
Usage Notes
Use a format with both r_xxx and h_xxx parameters only if the raster image and geoheader are in separate files.
This procedure does not support JPEG or GIF as a destination file format. You can use the client-side GeoRaster exporter tool, described in Section 1.10, to export to a JPEG file.
This procedure does not support GeoRaster objects that have a cellDepth value of 2BIT.
GeoRaster objects with a cell depth of 8 bits or greater that have a BSQ or BIL interleaving are exported in BIP interleaved format.
Before you call this procedure, you must have write permission on the output file or the directory to contain the files. The following example (run as user SYSTEM) grants write permission on a specified file to user HERMAN:
call dbms_java.grant_permission('HERMAN','SYS:java.io.FilePermission',
'sdo/demos/georaster/data/img1.tif', 'write' );
The maximum amount of GeoRaster data that can be exported in a single operation is 67 megabytes (MB). Thus, the maximum dimensions of a GeoRaster object that can be exported at one time must be such that width*height*bands*cellDepth/8 <= 67 MB and rowBlockSize*columnBlockSize*bands*cellDepth/8 <= 67 MB. For example, for a 3-band, 8-bit GeoRaster object in which the width and height are equal:
The largest exportable width and height are 4728x4728.
The largest exportable block dimensions are 4096x4096.
Examples
The following example shows two export operations. The first operation exports an entire GeoRaster object (except for any georeferencing information) into a BMP format file. The second operation exports a subset of the GeoRaster object to a file with an ESRI world file.
DECLARE geor SDO_GEORASTER; fileName VARCHAR2(1024); tfwName VARCHAR2(1024); BEGIN SELECT georaster INTO geor FROM georaster_table WHERE georid = 1; -- Export the whole GeoRaster object into a BMP file, excluding any -- georeferencing information. sdo_geor.exportTo(geor, NULL, 'BMP', 'file', 'sdo/demos/georaster/data/img1_export'); -- Export a subset to a file with a world file. fileName := '/mydir/parrotExported'; tfwName := '/mydir/parrotWorldFile'; SELECT georaster INTO geor FROM georaster_table WHERE georid = 8; sdo_geor.exportTo(geor, 'cropArea=(0,0,500,500)', 'TIFF', 'file', fileName, 'WORLDFILE', 'FILE', tfwName); END; /
The following example exports GeoRaster objects into BLOB and CLOB objects.
CREATE TABLE blob_table (blob_col BLOB, blobid NUMBER unique, clob_col CLOB); INSERT INTO blob_table values (empty_blob(), 3, null); INSERT INTO blob_table VALUES (empty_blob(), 4, empty_clob()); DECLARE lobd1 BLOB; lobd2 BLOB; lobd3 CLOB; geor1 SDO_GEORASTER; geor2 SDO_GEORASTER; BEGIN -- Example 1: Export to BLOB. SELECT blob_col INTO lobd1 FROM blob_table WHERE blobid=3 for update; SELECT georaster INTO geor1 FROM georaster_table WHERE georid = 13; sdo_geor.exportTo(geor1, '', 'TIFF', lobd1); UPDATE blob_table set blob_col = lobd1 WHERE blobid=3; COMMIT; -- Example 2: Export GeoRaster to BLOB with world file exported to CLOB. SELECT blob_col INTO lobd2 FROM blob_table WHERE blobid=4 for update; SELECT clob_col INTO lobd3 FROM blob_table WHERE blobid=4 for update; SELECT georaster INTO geor2 FROM georaster_table WHERE georid = 8; sdo_geor.exportTo(geor2, 'cropArea=(0,0,500,500)', 'TIFF', lobd2, 'WORLDFILE', lobd3); UPDATE blob_table set blob_col = lobd2, clob_col = lobd3 WHERE blobid = 4; COMMIT; END; /
Format
SDO_GEOR.generatePyramid(
georaster IN OUT SDO_GEORASTER,
pyramidParams IN VARCHAR2);
Description
Generates pyramid data, which is stored together with the original data.
Parameters
GeoRaster object for which pyramid data is to be generated and stored.
A string containing the pyramid parameters. See the Usage Notes for information about the available keywords and values.
Usage Notes
For information about pyramid data, see Section 1.7.
pyramidParams must be a quoted string that contains one or more of the following keywords, each with an appropriate value:
rLevel (for example, rLevel=2): Specifies the number of pyramid levels to create at a smaller (reduced) size than the original object. If you do not specify this keyword, pyramid levels are generated until the smaller of the number of rows or columns is between 64 and 128. The dimension sizes at each lower resolution level are equal to the truncated integer values of the dimension sizes at the next higher resolution level, divided by 2.
resampling (for example, resampling=NN): Specifies the resampling method. Must be one of the following: NN (value of the nearest neighbor cell in the original GeoRaster object), BILINEAR (distance-weighted average of the 4 nearest cells in the original GeoRaster object), AVERAGE4 (simple average of the 4 nearest cells in the original GeoRaster object), AVERAGE16 (simple average of the 16 nearest cells in the original GeoRaster object), CUBIC (cubic convolution of the 16 nearest cells in the original GeoRaster object).
If georaster is null or is a blank GeoRaster object, or if pyramid data exists for georaster but it was created with the same pyramid parameters specified in pyramidParams, this procedure performs no operation.
If pyramid data exists for georaster and it was created using different pyramid parameters from those specified in pyramidParams, the old pyramid data is deleted and new pyramid data is generated.
If you do not specify an rLevel value, the rLevel value is set to the default, which is calculated as follows:
(int)(log2(a / 64))
In the preceding calculation:
log2 is a logarithmic function with 2 as its base.
a is the smaller of the original row or column dimension size.
In the default case, the smaller of the row and column dimension sizes of the top-level overview (the smallest top-level pyramid) is between 64 and 128. If you specify an rLevel value greater than the maximum reduced-resolution level, the rLevel value is set to the maximum reduced-resolution level, which is calculated as follows:
(int)(log2(a))
In this case, the smaller of the row and column dimension sizes of the top-level overview is 1.
An exception is raised if georaster is invalid.
Examples
The following example creates pyramid data for a GeoRaster object.
DECLARE
gr sdo_georaster;
BEGIN
SELECT georaster INTO gr
FROM georaster_table WHERE georid = 6 FOR UPDATE;
-- Generate pyramids.
sdo_geor.generatePyramid(gr, 'rLevel=5, resampling=NN');
-- Update the original GeoRaster object.
UPDATE georaster_table SET georaster = gr WHERE georid = 6;
COMMIT;
END;
/
Format
SDO_GEOR.generateSpatialExtent(
georaster IN SDO_GEORASTER
) RETURN SDO_GEOMETRY;
Description
Generates a Spatial geometry that contains the spatial extent (footprint) of the GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The returned SDO_GEOMETRY object is based on the model coordinate system (SDO_SRID value) of the GeoRaster object. If the GeoRaster object is not georeferenced, the SDO_GEOMETRY object has a null SDO_SRID value, which means the footprint geometry is in cell space.
If the GeoRaster object is georeferenced, the footprint is automatically adjusted, based on its model coordinate location (CENTER or UPPERLEFT), to cover the whole area in the model space.
If georaster is null, this function returns a null SDO_GEOMETRY object.
This function does not set the spatial extent of the GeoRaster object (spatialExtent attribute, described in Section 2.1.2). For information about setting the spatial extent, see Section 3.7.
An exception is raised if georaster is not valid.
Examples
The following examples return the spatial extent geometry of GeoRaster objects in the GEORASTER column of the GEORASTER_TABLE table. (They refer to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.generateSpatialExtent(georaster) spatialExtent FROM georaster_table WHERE georid=2; SPATIALEXTENT(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINA -------------------------------------------------------------------------------- SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_ARR AY(0, 0, 256, 0, 511, 0, 511, 256, 511, 511, 256, 511, 0, 511, 0, 256, 0, 0)) SET NUMWIDTH 20 SELECT sdo_geor.generateSpatialExtent(georaster) spatialExtent FROM georaster_table WHERE georid=4; SPATIALEXTENT(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINA -------------------------------------------------------------------------------- SDO_GEOMETRY(2003, 82263, NULL, SDO_ELEM_INFO_ARRAY(1, 1003, 1), SDO_ORDINATE_AR RAY(1828466.0909315, 646447.1932945, 1828466.0909315, 644479.85524, 1828466.0909 315, 642512.5171855, 1830433.428986, 642512.5171855, 1832400.7670405, 642512.517 1855, 1832400.7670405, 644479.85524, 1832400.7670405, 646447.1932945, 1830433.42 8986, 646447.1932945, 1828466.0909315, 646447.1932945))
Format
SDO_GEOR.georeference(
georaster IN OUT SDO_GEORASTER,
srid IN NUMBER,
modelCoordinateLocation IN NUMBER,
xCoefficients IN SDO_NUMBER_ARRAY,
yCoefficients IN SDO_NUMBER_ARRAY);
Description
Georeferences a GeoRaster object using specified cell-to-model transformation coefficients.
Parameters
The SDO_GEORASTER object to be georeferenced.
Model coordinate system. Must not be null or 0 (zero). It can be a value from the SRID column of the MDSYS.CS_SRS table. If it is not a value from the SRID column of the MDSYS.CS_SRS table, the SRID is not supported by Oracle Spatial, and some SRID-related operations may not be supported.
A value specifying the model location of the base of the area represented by a cell: 0 for CENTER or 1 for UPPERLEFT.
An array specifying the A, B, and C coefficient values in the calculation, as explained in Section 1.6.
An array specifying the D, E, and F coefficient values in the calculation, as explained in Section 1.6.
Usage Notes
Use this procedure to georeference a GeoRaster object. Georeferencing is explained in Section 1.6 and Section 3.6.
This procedure sets the spatial resolutions of the GeoRaster object.
The following also perform operations related to georeferencing:
The SDO_GEOR.setSRS procedure sets or deletes georeferencing information.
The SDO_GEOR.importFrom procedure can load an ESRI world file from a file or from a CLOB object.
The GeoRaster loader tool (described in Section 1.10) can load an ESRI world file from a file.
Examples
The following example georeferences a GeoRaster object, and it calls the SDO_GEOR.getSRS function to retrieve information related to the spatial referencing of the object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr sdo_georaster;
BEGIN
SELECT georaster INTO gr FROM georaster_table WHERE georid = 1 FOR UPDATE;
sdo_geor.georeference(gr, 82394, 1,
sdo_number_array(28.5, 0, 1232804.04),
sdo_number_array(0, -28.5, 13678.09));
UPDATE georaster_table SET georaster = gr WHERE georid = 1;
COMMIT;
END;
/
PL/SQL procedure successfully completed.
SET NUMWIDTH 20
SELECT georid, sdo_geor.getSRS(georaster) SRS FROM georaster_table
WHERE georid = 1;
GEORID
--------------------
SRS(ISREFERENCED, ISRECTIFIED, ISORTHORECTIFIED, SRID,
SPATIALRESOLUTION, SPATIA
--------------------------------------------------------------------------------
1
SDO_GEOR_SRS('TRUE', 'TRUE', NULL, 82394, SDO_NUMBER_ARRAY(28.5, 28.5), NULL, NU
LL, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, NULL, NULL, NULL, SDO_NUMBER_ARRAY(1, 2, 1, 3,
479.93298245614, 0, -.0350877192982456), SDO_NUMBER_ARRAY(1, 0, 0, 1, 1), SDO_N
UMBER_ARRAY(1, 2, 1, 3, -43256.2821052632, .0350877192982456, 0), SDO_NUMBER_ARR
AY(1, 0, 0, 1, 1))
Format
SDO_GEOR.getBandDimSize(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the number of bands in a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
For an explanation of bands, see Section 1.5.
If georaster or its metadata is null, this function returns a null value.
Examples
The following example returns the spatial dimension sizes and the number of bands (one in this case) for a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT sdo_geor.getSpatialDimSizes(georaster) spatialDimSizes,
sdo_geor.getBandDimSize(georaster) bandDimSize
FROM georaster_table WHERE georid=21;
SPATIALDIMSIZES BANDDIMSIZE
-------------------------- -----------
SDO_NUMBER_ARRAY(512, 512) 1
Format
SDO_GEOR.getBeginDateTime(
georaster IN SDO_GEORASTER
) RETURN TIMESTAMP WITH TIME ZONE;
Description
Returns the beginning date and time for raster data collection in the metadata for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
To set the beginning date and time for raster data collection in the metadata for a GeoRaster object, use the SDO_GEOR.setBeginDateTime procedure.
If georaster or its metadata is null, this function returns a null value.
Examples
The following example returns the beginning and ending dates and times for raster data collection in the metadata for the GeoRaster object in a table named GEORASTER_TABLE where the GEORID column contains the value 4. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getBeginDateTime(georaster) beginDateTime, sdo_geor.getEndDateTime(georaster) endDateTime FROM georaster_table WHERE georid=4; BEGINDATETIME --------------------------------------------------------------------------- ENDDATETIME --------------------------------------------------------------------------- 01-JAN-00 05.00.00.000000000 AM +00:00 15-NOV-02 08.00.00.000000000 PM +00:00
Format
SDO_GEOR.getBinTable(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the name of the bin table associated with a layer.
Note:
GeoRaster does not perform operations using the BIN function or the bin table in the current release.Parameters
GeoRaster object.
Number of the layer for which to return the bin table name. A value of 0 (zero) indicates the object layer.
Usage Notes
This function is relevant only if the bin type is EXPLICIT. To retrieve the bin type, use the SDO_GEOR.getBinType function.
To specify a bin table for a layer, use the SDO_GEOR.setBinTable procedure.
See also the information in the Usage Notes for the SDO_GEOR.getBinType function.
If georaster or its metadata is null, this function returns a null value.
An exception is raised if layerNumber is null, negative, or greater than the maximum layer number.
Examples
The following example returns the name of the bin table for layer number 4 of a specified GeoRaster object in a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getBinTable(georaster, 4) FROM georaster_table WHERE georid=4;
Format
SDO_GEOR.getBinType(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the bin type associated with a layer.
Parameters
GeoRaster object.
Number of the layer for which to return the bin type. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns one of the following bin type values: LINEAR, LOGARITHM, or EXPLICIT.
The LINEAR bin type is defined as follows:
binNumber = numbins * (cellValue - min) / (max - min) + firstBinNumber if (binNumber less than 0) binNumber = firstBinNumber if (binNumber greater than or equal to numbins) binNumber = numbins + firstBinNumber - 1
The LOGARITHM bin type is defined as follows:
binNumber = numbins * (ln (1.0 + ((cellValue - min)/(max - min)))/ ln (2.0)) + firstBinNumber if (binNumber less than 0) binNumber = firstBinNumber if (binNumber greater than or equal to numbins) binNumber = numbins + firstBinNumber - 1
The EXPLICIT bin type means that the value (or value range) for each bin is stored in a bin table (which you can set using the SDO_GEOR.setBinTable procedure and retrieve using the SDO_GEOR.getBinTable function).
A bin function maps values or value ranges of the GeoRaster cells to specific bin numbers, which are all integers. GeoRaster does not provide interfaces to manipulate and process bin functions.
If georaster or its metadata is null, this function returns a null value.
An exception is raised if layerNumber is null, negative, or greater than the maximum layer number.
Examples
The following example returns the bin types for layers 0 and 1 of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT substr(sdo_geor.getBinType(georaster, 0),1,20) binType0,
substr(sdo_geor.getBinType(georaster, 1),1,20) binType1
FROM georaster_table WHERE georid=4;
BINTYPE0 BINTYPE1
--------------- ---------------
EXPLICIT LINEAR
Format
SDO_GEOR.getBlankCellValue(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the cell value for all cells if a specified GeoRaster object is a blank GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
In a blank GeoRaster object, all cells have the same cell value. This function returns the cell value for all cells if the specified GeoRaster object is a blank GeoRaster object.
To set the cell value to be used if a specified GeoRaster object is a blank GeoRaster object, use the SDO_GEOR.setBlankCellValue procedure. To determine if a specified GeoRaster object is a blank GeoRaster object, use the SDO_GEOR.isBlank function.
If georaster is null, invalid, or is not a blank GeoRaster object, the SDO_GEOR.getBlankCellValue function returns a null value.
Examples
The following example returns the blank cell values for all blank GeoRaster objects in the GEORASTER column of table GEORASTER_TABLE.
SELECT georid, sdo_geor.getBlankCellValue(georaster) blankValue
FROM georaster_table WHERE sdo_geor.isBlank(georaster)='TRUE';
GEORID BLANKVALUE
---------- ----------
1 255
2 155
Format
SDO_GEOR.getBlockingType(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the blocking type for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
This function returns one of the following values: NONE or REGULAR:
NONE means that the GeoRaster object is not blocked, but is a single BLOB object.
REGULAR means that the GeoRaster object uses regular blocking, that is, each block has the same dimension sizes.
If georaster or its metadata is null, this function returns a null value.
Examples
The following example returns the cell depth, interleaving type, and blocking type of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getCellDepth(georaster) CellDepth,
substr(sdo_geor.getInterleavingType(georaster),1,8) interleavingType,
substr(sdo_geor.getBlockingType(georaster),1,8) blocking
FROM georaster_table WHERE georid=21;
CELLDEPTH INTERLEA BLOCKING
---------- -------- --------
8 BSQ REGULAR
Format
SDO_GEOR.getBlockSize(
georaster IN SDO_GEORASTER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the number of cells for each dimension in each block of a GeoRaster object in an array showing the number of cells for each row, column, and (if relevant) band.
Parameters
GeoRaster object.
Usage Notes
If georaster or its metadata is null, or if georaster is not blocked, this function returns a null value.
Examples
The following example returns the number of cells (512 in each dimension) in each block of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getBlockSize(georaster) blockSize FROM georaster_table WHERE georid=21; BLOCKSIZE -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(512, 512)
Format
SDO_GEOR.getCellCoordinate(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
modelCoordinate IN SDO_GEOMETRY
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the coordinates in the cell (raster) coordinate system associated with the point at the specified model (ground) coordinates.
Parameters
GeoRaster object.
Pyramid level containing the cell specified in modelCoordinate.
A point geometry that contains two coordinates, such as (longitude,latitude) or (x,y) values, identifying the point in the model (ground) coordinate system.
Usage Notes
Use this function to transform a point in the ground coordinate system (a longitude, latitude pair) to the location of a point on the GeoRaster image.
Contrast this function with the SDO_GEOR.getModelCoordinate function, which returns a point geometry containing the coordinates in the model (ground) coordinate system associated with the point at the specified cell coordinates.
Examples
The following example returns the cell coordinates in the raster image associated with model coordinate values (32343.64,7489527.23) in a specified GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getCellCoordinate(georaster, 0, sdo_geometry(2001,82394, sdo_point_type(32343.64,7489527.23,null), null,null)) coord FROM georaster_table WHERE georid=4; COORD -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(100, 100)
Format
SDO_GEOR.getCellDepth(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the cell depth in bits.
Parameters
GeoRaster object.
Usage Notes
The cell depth determines the precision and the data size of an image. As the cell depth value decreases, less disk space is needed to store the image; as the cell depth value increases, more disk space is needed to store the image.
To return the cell depth as a string (such as 32BIT_S) instead of a number, you can use the XMLType PL/SQL interface extract. The possible string values are listed in the cellDepthType definition in the GeoRaster metadata XML schema, which is described in Appendix A. The following example returns a string value for the cell depth of the GeoRaster object with the GEORID column value of 21 in the GEORASTER_TABLE table:
SELECT t.georaster.metadata.extract(
'/georasterMetadata/rasterInfo/cellDepth/text()',
'xmlns=http://xmlns.oracle.com/spatial/georaster')
FROM georaster_table t WHERE t.georid=21;
Examples
The following example returns the cell depth, interleaving type, and blocking type of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getCellDepth(georaster) CellDepth,
substr(sdo_geor.getInterleavingType(georaster),1,8) interleavingType,
substr(sdo_geor.getBlockingType(georaster),1,8) blocking
FROM georaster_table WHERE georid=21;
CELLDEPTH INTERLEA BLOCKING
---------- -------- --------
8 BSQ REGULAR
Format
SDO_GEOR.getCellValue(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
rowNumber IN NUMBER,
colNumber IN NUMBER,
bandNumber IN NUMBER
) RETURN NUMBER;
or
SDO_GEOR.getCellValue(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
ptGeom IN SDO_GEOMETRY,
layerNumber IN NUMBER
) RETURN NUMBER;
Description
Returns the value of a single cell located anywhere in the GeoRaster object by specifying its row, column, and band number in its cell coordinate system, or by specifying a point geometry in its model coordinate system and its logical layer number.
To change the value of raster data cells in a specified window of a GeoRaster object, use the SDO_GEOR.changeCellValue procedure.
Parameters
GeoRaster object.
Pyramid level containing the cell whose value is to be returned.
Number of the row that contains the cell whose value is to be returned.
Number of the column that contains the cell whose value is to be returned.
Number of the physical band that contains the cell whose value is to be returned.
Point geometry that identifies the cell whose value is to be returned.
Number of the logical layer that contains the cell whose value is to be returned. (As mentioned in Section 1.5, the logical layer number is the physical band number plus 1.)
Usage Notes
This function returns the original cell value stored in the raster object. It does not apply the scaling function defined in the metadata (which is typically used to scale the original cell data to a desired value or range of values), and it does not apply the BIN function. To get the scaled cell value, follow these steps:
Call the SDO_GEOR.getCellValue function to return the original cell value.
Call the SDO_GEOR.getScaling function to return the coefficients of the scaling function (a0, a1, b0, b1).
Using PL/SQL or another programming language, calculate the result using the following formula:
value = (a0 + a1 * cellvalue) / (b0 + b1 * cellvalue)
Examples
The following example returns the values of four cells of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getCellValue(georaster,0,383,47,0) V383_47,
sdo_geor.getCellValue(georaster,0,47,383,0) V47_383,
sdo_geor.getCellValue(georaster,0,128,192,0) V128_192,
sdo_geor.getCellValue(georaster,0,320,256,0) V320_256
FROM georaster_table WHERE georid=21;
V383_47 V47_383 V128_192 V320_256
---------- ---------- ---------- ----------
48 55 52 53
Format
SDO_GEOR.getColorMap(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN SDO_GEOR_COLORMAP;
Description
Returns the colormap for pseudocolor display of a layer in a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the colormap. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns an object of type SDO_GEOR_COLORMAP. Section 2.3.2 describes colormaps and this object type.
To set the colormap for a layer in a GeoRaster object, use the SDO_GEOR.setColorMap procedure.
If georaster or its metadata is null, this function returns a null value.
An exception is raised if layerNumber is null, negative, or greater than the maximum layer number.
Examples
The following example returns the colormap for layer 1 of a GeoRaster object. (Part of the output is omitted.)
SELECT sdo_geor.getColorMap(georaster, 1) FROM georaster_table WHERE georid = 4; SDO_GEOR.GETCOLORMAP(GEORASTER,1)(CELLVALUE, RED, GREEN, BLUE, ALPHA) -------------------------------------------------------------------------------- SDO_GEOR_COLORMAP(SDO_NUMBER_ARRAY(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255), SDO_NUMBER_ARRAY(180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 180, 18 0, 127, 127, 100, 50, 50, 127, 159, 191, 223, 255, 255, 255, 255, 218, 182, 145, 109, 72, 36, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 36, 72, 109, 145, 182, 218, 255, 200, 206, 212, 218, 224, 230, 236, 242, 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255), SDO_NUMBER_ARRAY(127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 180, 127, 50, 100, 50, 127, 159, 191, 223, 255, 200, 150, 100, 122, 144, 166, 188, 210, 232, 255, 255, 255, 248, 241, 234, 227, 220, 213, 206, 200, 150, 100, 87, 75, 62, 50, 37, 25, 12, 0, 200, 127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, 56, 85, 113, 141, 170, 198, 226, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255), SDO_NUMBER_ARRAY(127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 180, 50, 50, 100, 127, 95, 63, 31, 0, 0, 0, 0, 18, 36, 54, 72, 90, 108, 127, 100, 50, 43, 37, 31, 25, 18, 12, 6, 0, 0, 0, 31, 63, 95, 127, 159, 191, 223, 255, 255, 255, 127, 108, 90, 72, 54, 36, 18, 0, 0, 28, 56, 85, 113, 141, 170, 198, 226, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255), SDO_NUMBER_ARRAY(255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255))
Format
SDO_GEOR.getColorMapTable(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the colormap table for pseudocolor display of a layer in a GeoRaster object.
Note:
GeoRaster does not perform operations using the colormap table in the current release.Parameters
GeoRaster object.
Number of the layer for which to return the colormap table. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns the name of a user-defined colormap table. For information about colormaps, see Section 2.3.2.
To set the colormap table for a layer in a GeoRaster object, use the SDO_GEOR.setColorMapTable procedure.
If georaster or its metadata is null, this function returns a null value.
An exception is raised if layerNumber is null, negative, or greater than the maximum layer number.
Examples
The following example returns the colormap table for layer 2 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getColorMapTable(georaster, 2) FROM georaster_table WHERE georid=4; SDO_GEOR.GETCOLORMAPTABLE(GEORASTER,2) -------------------------------------------------------------------------------- CMT1 1 row selected.
Format
SDO_GEOR.getCompressionType(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the compression type for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
This function can return DEFLATE, JPEG-B, JPEG-F, or NONE (the latter value meaning that the GeoRaster object is not compressed). For information about GeoRaster compression, see Section 1.8.
Examples
The following example returns the compression type for the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, substr(sdo_geor.getCompressionType(georaster),1,20) compressionType
FROM georaster_table;
GEORID COMPRESSIONTYPE
---------- --------------------
2 DEFLATE
4 JPEG-B
Format
SDO_GEOR.getDefaultBlue(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the number of the layer to be used for the blue color component (in the RGB color space) for displaying a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
You can return the layer numbers for all three color components (RGB) by using the SDO_GEOR.getDefaultColorLayer function.
Examples
The following example returns the layer numbers for the red, blue, and green color components for displaying the GeoRaster objects in the table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getDefaultRed(georaster) red,
sdo_geor.getDefaultGreen(georaster) green,
sdo_geor.getDefaultBlue(georaster) blue
FROM georaster_table;
GEORID RED GREEN BLUE
---------- ---------- ---------- ----------
1 1 2 3
2
3 31 20 13
Format
SDO_GEOR.getDefaultColorLayer(
georaster IN SDO_GEORASTER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the default numbers of the layers to be used for the red, green, and blue color components, respectively, for displaying a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The RGB layer numbers returned are used for true-color displays, not for pseudocolor or grayscale displays.
You can return the layer number for each color component (RGB) by using the SDO_GEOR.getDefaultRed, SDO_GEOR.getDefaultGreen, and SDO_GEOR.getDefaultBlue functions.
Examples
The following example sets the default red, green, and blue color layers for the GeoRaster objects (GEORASTER column) in table GEORASTER_TABLE, and it returns an array with the layer numbers for the red, green, and blue color components for displaying these GeoRaster objects. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setDefaultRed(grobj, 2); sdo_geor.setDefaultGreen(grobj, 3); sdo_geor.setDefaultBlue(grobj, 1); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; / SELECT sdo_geor.getDefaultColorLayer(georaster) FROM georaster_table WHERE georid=4; SDO_GEOR.GETDEFAULTCOLORLAYER(GEORASTER) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(2, 3, 1) 1 row selected.
Format
SDO_GEOR.getDefaultGreen(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the number of the layer to be used for the green color component (in the RGB color space) for displaying a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
You can return the layer numbers for all three color components (RGB) by using the SDO_GEOR.getDefaultColorLayer function.
Examples
The following example returns the layer numbers for the red, blue, and green color components for displaying the GeoRaster objects in the table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getDefaultRed(georaster) red,
sdo_geor.getDefaultGreen(georaster) green,
sdo_geor.getDefaultBlue(georaster) blue
FROM georaster_table;
GEORID RED GREEN BLUE
---------- ---------- ---------- ----------
1 1 2 3
2
3 31 20 13
Format
SDO_GEOR.getDefaultRed(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the number of the layer to be used for the red color component (in the RGB color space) for displaying a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
You can return the layer numbers for all three color components (RGB) by using the SDO_GEOR.getDefaultColorLayer function.
Examples
The following example returns the layer numbers for the red, blue, and green color components for displaying the GeoRaster objects in the table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getDefaultRed(georaster) red,
sdo_geor.getDefaultGreen(georaster) green,
sdo_geor.getDefaultBlue(georaster) blue
FROM georaster_table;
GEORID RED GREEN BLUE
---------- ---------- ---------- ----------
1 1 2 3
2
3 31 20 13
Format
SDO_GEOR.getEndDateTime(
georaster IN SDO_GEORASTER
) RETURN TIMESTAMP WITH TIME ZONE;
Description
Returns the ending date and time for raster data collection in the metadata for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
To set the ending date and time for raster data collection in the metadata for a GeoRaster object, use the SDO_GEOR.setEndDateTime procedure.
If georaster or its metadata is null, this function returns a null value.
Examples
The following example returns the beginning and ending dates and times for raster data collection in the metadata for the GeoRaster object in a table named GEORASTER_TABLE where the GEORID column contains the value 4. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getBeginDateTime(georaster) beginDateTime, sdo_geor.getEndDateTime(georaster) endDateTime FROM georaster_table WHERE georid=4; BEGINDATETIME --------------------------------------------------------------------------- ENDDATETIME --------------------------------------------------------------------------- 01-JAN-00 05.00.00.000000000 AM +00:00 15-NOV-02 08.00.00.000000000 PM +00:00
Format
SDO_GEOR.getGrayScale(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN SDO_GEOR_GRAYSCALE;
Description
Returns the grayscale mappings for a layer in a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the grayscale mappings. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns an object of type SDO_GEOR_GRAYSCALE. Section 2.3.3 describes grayscale display and this object type.
To set the grayscale mappings for a layer in a GeoRaster object, use the SDO_GEOR.setGrayScale procedure.
Examples
The following example returns the grayscale mappings for layer 0 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 0 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getGrayScale(georaster, 0) FROM georaster_table WHERE georid=0; SDO_GEOR.GETGRAYSCALE(GEORASTER,0)(CELLVALUE, GRAY) -------------------------------------------------------------------------------- SDO_GEOR_GRAYSCALE(SDO_NUMBER_ARRAY(10, 20, 30, 255), SDO_NUMBER_ARRAY(180, 210, 230, 250))
Format
SDO_GEOR.getGrayScaleTable(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the grayscale mapping table for a layer in a GeoRaster object.
Note:
GeoRaster does not perform operations using the grayscale mapping table in the current release.Parameters
GeoRaster object.
Number of the layer for which to return the grayscale mapping table. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns the name of a user-defined grayscale table. Section 2.3.3 describes grayscale display.
To set the grayscale mapping table for a layer in a GeoRaster object, use the SDO_GEOR.setGrayScaleTable procedure.
Examples
The following example returns the grayscale mapping tables for layers 0, 1, 2, and 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT substr(sdo_geor.getGrayScaleTable(georaster, 0),1,20) grayScaleTable0,
substr(sdo_geor.getGrayScaleTable(georaster, 1),1,20) grayScaleTable1,
substr(sdo_geor.getGrayScaleTable(georaster, 2),1,20) grayScaleTable2,
substr(sdo_geor.getGrayScaleTable(georaster, 3),1,20) grayScaleTable3
FROM georaster_table WHERE georid=4;
GRAYSCALETABLE0 GRAYSCALETABLE1 GRAYSCALETABLE2 GRAYSCALETABLE3
-------------------- -------------------- -------------------- -----------------
SCL0 SCL1 SCL2 SCL3
Format
SDO_GEOR.getHistogram(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN SDO_GEOR_HISTOGRAM;
Description
Returns the histogram for a layer in a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the histogram. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns an object of type SDO_GEOR_HISTOGRAM. Section 2.3.1 describes this object type and briefly discusses histograms.
Examples
The following example returns the histogram for layer 1 of a 4-bit GeoRaster object in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getHistogram(georaster, 1) layer1 FROM georaster_table WHERE georid=17; LAYER1(CELLVALUE, COUNT) -------------------------------------------------------------------------------- SDO_GEOR_HISTOGRAM(SDO_NUMBER_ARRAY(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,12, 13, 14, 15), SDO_NUMBER_ARRAY(10, 18, 10, 110, 200, 120, 130, 150, 160, 103, 106, 190, 12, 17, 10, 5))
Format
SDO_GEOR.getHistogramTable(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the histogram table for a layer in a GeoRaster object.
Note:
GeoRaster does not perform operations using the histogram table in the current release.Parameters
GeoRaster object.
Number of the layer for which to return the name of the histogram table. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns a user-defined histogram table. Section 2.3.1 briefly discusses histograms.
To set the name of the histogram table for a layer, use the SDO_GEOR.setHistogramTable procedure.
Examples
The following example returns the histogram tables for layers 0 (the whole object), 1, 2, and 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT substr(sdo_geor.getHistogramTable(georaster, 0),1,20) histogramTable0,
substr(sdo_geor.getHistogramTable(georaster, 1),1,20) histogramTable1,
substr(sdo_geor.getHistogramTable(georaster, 2),1,20) histogramTable2,
substr(sdo_geor.getHistogramTable(georaster, 3),1,20) histogramTable3
FROM georaster_table WHERE georid=4;
HISTOGRAMTABLE0 HISTOGRAMTABLE1 HISTOGRAMTABLE2 HISTOGRAMTABLE3
-------------------- -------------------- -------------------- -----------------
HIST0 HIST1 HIST2 HIST3
Format
SDO_GEOR.getID(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the user-defined identifier value associated with a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
To set a user-defined identifier value for a GeoRaster object, use the SDO_GEOR.setID procedure.
Examples
The following example returns the user-defined identifier values of the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, substr(sdo_geor.getID(georaster),1,50) GEOR_ID
FROM georaster_table;
GEORID GEOR_ID
---------- --------------------------------------------------
2 TM_102
4 TM_104
Format
SDO_GEOR.getInterleavingType(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the interleaving type for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
This function returns one of the following values: BSQ (band sequential), BIL (band interleaved by line), or BIP (band interleaved by pixel).
To change the interleaving type for a GeoRaster object, use the SDO_GEOR.changeFormatCopy procedure, and use the interleaving keyword in the storageParam parameter string.
Examples
The following example returns the cell depth, interleaving type, and blocking type of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getCellDepth(georaster) CellDepth,
substr(sdo_geor.getInterleavingType(georaster),1,8) interleavingType,
substr(sdo_geor.getBlockingType(georaster),1,8) blocking
FROM georaster_table WHERE georid=21;
CELLDEPTH INTERLEA BLOCKING
---------- -------- --------
8 BSQ REGULAR
Format
SDO_GEOR.getLayerDimension(
georaster IN SDO_GEORASTER
) RETURN SDO_STRING_ARRAY;
Description
Returns the dimension that is mapped as the logical layer dimension of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The layer dimension refers to the physical entity associated with the logical term layer. For the current release, the only supported layer dimension is BAND: that is, the logical concept layer is associated with the physical term band, as shown in Figure 1-4 in Section 1.5. In this case, layers will be mapped to the BAND dimension, so that the first layer is band 0, the second layer is band 1, and so on.
Examples
The following example returns the layer dimension of each GeoRaster object (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1. (The output is reformatted for readability.)
SELECT georid, sdo_geor.getLayerDimension(georaster) FROM georaster_table;
GEORID SDO_GEOR.GETLAYERDIMENSION(GEORASTER)
---------- ------------------------------------------------------------------
2 SDO_STRING_ARRAY('BAND')
4 SDO_STRING_ARRAY('BAND')
Format
SDO_GEOR.getLayerID(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the user-defined identifier value associated with a layer in a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the user-defined identifier value. A value of 0 (zero) indicates the object layer.
Usage Notes
To set a user-defined identifier value for a layer in a GeoRaster object, use the SDO_GEOR.setLayerID procedure.
Examples
The following example returns the user-defined identifier values of layers 0, 1, 2, and 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT substr(sdo_geor.getLayerID(georaster, 0),1,12) layerID0,
substr(sdo_geor.getLayerID(georaster, 1),1,12) layerID1,
substr(sdo_geor.getLayerID(georaster, 2),1,12) layerID2,
substr(sdo_geor.getLayerID(georaster, 3),1,12) layerID3
FROM georaster_table WHERE georid=4;
LAYERID0 LAYERID1 LAYERID2 LAYERID3
------------ ------------ ------------ ------------
TM543 TM3 TM4 TM5
Format
SDO_GEOR.getLayerOrdinate(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN NUMBER;
Description
Returns the band ordinate for a layer in a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the physical band ordinate. A value of 0 (zero) indicates the object layer.
Usage Notes
The returned number refers to the physical band that a layer (layerNumber parameter value) is associated with. For the current release, by default the associations are as shown in Figure 1-4 in Section 1.5: layer 1 is band 0, layer 2 is band 1, and so on.
To set the band ordinate value for a layer, use the SDO_GEOR.setLayerOrdinate procedure.
Examples
The following example returns the band numbers associated with layers 0, 1, 2, and 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT sdo_geor.getLayerOrdinate(georaster, 0) layerOrdinate0,
sdo_geor.getLayerOrdinate(georaster, 1) layerOrdinate1,
sdo_geor.getLayerOrdinate(georaster, 2) layerOrdinate2,
sdo_geor.getLayerOrdinate(georaster, 3) layerOrdinate3
FROM georaster_table WHERE georid=4;
LAYERORDINATE0 LAYERORDINATE1 LAYERORDINATE2 LAYERORDINATE3
-------------- -------------- -------------- --------------
0 1 2
Format
SDO_GEOR.getModelCoordinate(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
cellCoordinate IN SDO_NUMBER_ARRAY
) RETURN SDO_GEOMETRY;
Description
Returns a point geometry object that contains the coordinates in the model (ground) coordinate system associated with the point at the specified cell (raster) coordinates.
Parameters
GeoRaster object.
Pyramid level containing the cell specified in cellCoordinate.
Array of two coordinates identifying the point in the cell coordinate system. The two coordinates are the row number and column number of the point.
Usage Notes
Use this function to transform the location of a point on the GeoRaster object to the longitude and latitude coordinates of its associated point in the ground coordinate system.
The input GeoRaster data must be georeferenced. The resulting geometry has the same SDO_SRID value as the input GeoRaster object.
Contrast this function with the SDO_GEOR.getCellCoordinate function, which returns the coordinates in the cell (raster) coordinate system associated with the point at the specified model (ground) coordinates.
Examples
The following example returns a point geometry object containing the model coordinates associated with cell coordinates (100,100) in a specified GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SET NUMWIDTH 20 SELECT sdo_geor.getModelCoordinate(georaster, 0, sdo_number_array(100,100)) mcoord FROM georaster_table WHERE georid=4; MCOORD(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES) -------------------------------------------------------------------------------- SDO_GEOMETRY(2001, 82394, SDO_POINT_TYPE(347.666315789474, 43274.9052631579, NUL L), NULL, NULL)
Format
SDO_GEOR.getModelSRID(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the coordinate system (SDO_SRID value) associated with the model (ground) space for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
This function returns a null value if no coordinate system is associated with the model space.
To set the coordinate system (SDO_SRID value) associated with the model space, use the SDO_GEOR.setModelSRID procedure.
Examples
The following example returns the SDO_SRID values associated with the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getModelSRID(georaster) SRID FROM georaster_table;
GEORID SRID
---------- ----------
2 82394
4 82394
Format
SDO_GEOR.getNODATA(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the value representing NODATA cells in a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
Some cells of a GeoRaster object may have no meaningful value assigned or collected. The NODATA value is the cell value for those cells, and it means that those cells are not semantically defined. The application is responsible for defining the meaning or significance of cells identified as NODATA cells.
If this function returns a null value, it means that all cells of the GeoRaster object are defined and have a meaningful cell value.
Examples
The following example returns the value to be used for NODATA cells in the GeoRaster objects (GEORASTER column) in table GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getNODATA(georaster) NODATA from georaster_table;
GEORID NODATA
---------- ----------
1
2 -9999.99
Format
SDO_GEOR.getPyramidMaxLevel(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the level number of the top pyramid of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
For information about pyramids, see Section 1.7.
Examples
The following example returns the pyramid type and level number of the top pyramid for the GeoRaster object (GEORASTER column) in the row with an GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT substr(sdo_geor.getPyramidType(georaster),1,10) pyramidType,
sdo_geor.getPyramidMaxLevel(georaster) maxLevel
FROM georaster_table WHERE georid=21;
PYRAMIDTYP MAXLEVEL
---------- ----------
DECREASE 3
Format
SDO_GEOR.getPyramidType(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the pyramid type for a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The pyramid type can be NONE (no pyramids) or DECREASE.
For information about pyramids, see Section 1.7.
Examples
The following example returns the pyramid type and level number of the top pyramid for the GeoRaster object (GEORASTER column) in the row with an GEORID column value of 21 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT substr(sdo_geor.getPyramidType(georaster),1,10) pyramidType,
sdo_geor.getPyramidMaxLevel(georaster) maxLevel
FROM georaster_table WHERE georid=21;
PYRAMIDTYP MAXLEVEL
---------- ----------
DECREASE 3
Format
SDO_GEOR.getRasterBlocks(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
window IN SDO_NUMBER_ARRAY
) RETURN SDO_RASTERSET;
or
SDO_GEOR.getRasterBlocks(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
window IN SDO_GEOMETRY
) RETURN SDO_RASTERSET;
Description
Returns an object of the SDO_RASTERSET collection type that identifies all blocks of a specified pyramid level that have any spatial interaction with a specified window.
Parameters
GeoRaster object.
Pyramid level from which to return the blocks that have any spatial interaction with the specified window.
Window from which to return the blocks that are in pyramidLevel. The data type can be SDO_NUMBER_ARRAY or SDO_GEOMETRY. If the data type is SDO_NUMBER_ARRAY, the parameter identifies the upper-left (row, column) and lower-right (row, column) coordinates of a rectangular window, and raster space is assumed. If the data type is SDO_GEOMETRY, see the Usage Notes for SDO_SRID requirements.
Usage Notes
The SDO_RASTERSET collection type is described in Section 2.3.4.
If the window parameter data type is SDO_GEOMETRY, the SDO_SRID value must be one of the following:
Null, to specify raster space
A value from the SRID column of the MDSYS.CS_SRS table
If the SDO_SRID values for the window parameter geometry and the model space are different, the window parameter geometry is automatically transformed to the coordinate system of the model space before the operation is performed. (Raster space and model space are explained in Section 1.3.)
Examples
The following example returns a collection set that identifies all raster blocks that have any spatial interaction with the specified window. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE gr sdo_georaster; ds sdo_rasterset; BEGIN SELECT georaster INTO gr FROM georaster_table WHERE georid=2; ds := sdo_geor.getRasterBlocks(gr, 0, sdo_number_array(11,65,192,244)); COMMIT; END; /
Format
SDO_GEOR.getRasterData(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
rasterBlob IN OUT BLOB,
storageParam IN VARCHAR2 DEFAULT NULL);
Description
Creates a single BLOB object that contains all raster data of the input GeoRaster object at the specified pyramid level.
Parameters
GeoRaster object.
Pyramid level for which to perform the operation.
BLOB object to hold the result.
A string specifying storage parameters to be applied in creating rasterBlob. The only storageParam keywords supported for this procedure are celldepth, compression, interleaving, and quality; all other keywords are ignored. Storage parameters are explained in Section 1.4.1.
If storageParam is null or not specified, the cell depth, interleaving, and compression type (and compression quality, if applicable) are the same as for the input GeoRaster object.
Usage Notes
If the GeoRaster object is blocked, the mosaic of all blocks of the specified pyramid level is returned.
After the procedure completes, the rasterBlob object contains the cell (pixel) data without tiling.
You can specify compression even if the input GeoRaster object is not compressed or is compressed in a different format from what you specify in the storageParam parameter. To have decompressed output for a compressed input GeoRaster object, specify compression=NONE in the storageParam parameter. For information about GeoRaster compression and decompression, see Section 1.8.
Examples
The following example creates a BLOB object, using full-format baseline JPEG (JPEG-F) compression, with all raster data from the GeoRaster object whose ID value is 2 in the GEORASTER_TABLE table. The definition of this table is presented after Example 1-1 in Section 1.4.1.
DECLARE gr sdo_georaster; lb blob; BEGIN SELECT georaster INTO gr FROM georaster_table WHERE georid=2; dbms_lob.createTemporary(lb, FALSE); sdo_geor.getRasterData(gr, 0, lb, 'compress=JPEG-F'); dbms_lob.freeTemporary(lb); END; /
Format
SDO_GEOR.getRasterSubset(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
window IN SDO_NUMBER_ARRAY,
bandNumbers IN VARCHAR2,
rasterBlob IN OUT BLOB,
storageParam IN VARCHAR2 DEFAULT NULL);
or
SDO_GEOR.getRasterSubset(
georaster IN SDO_GEORASTER,
pyramidLevel IN NUMBER,
window IN SDO_GEOMETRY,
layerNumbers IN VARCHAR2,
rasterBlob IN OUT BLOB,
storageParam IN VARCHAR2 DEFAULT NULL);
Description
Creates a single BLOB object containing all cells of a specified pyramid level that are inside or on the boundary of a specified window.
Parameters
GeoRaster object.
Pyramid level on which to perform the operation.
A rectangular window from which to crop the cells. If the data type is SDO_NUMBER_ARRAY, the parameter identifies the upper-left (row, column) and lower-right (row, column) coordinates of a rectangular window, and raster space is assumed. If the data type is SDO_GEOMETRY, the MBR of the geometry object is used as the window; see also the Usage Notes for SDO_SRID requirements.
If window is of type SDO_NUMBER_ARRAY, use the bandNumbers parameter to specify one or more band numbers; if window is of type SDO_GEOMETRY, use the layerNumbers parameter to specify one or more layer numbers.
A string identifying the logical layer numbers on which the operation or operations are to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 2-4 for layers 2, 3, and 4). If you specify a null value for this parameter, the operation or operations are performed on all layers.
A string identifying the physical band numbers on which the operation or operations are to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 1-3 for bands 1, 2, and 3). If you specify a null value for this parameter, the operation or operations are performed on all bands.
BLOB object to hold the result (the mosaicked raster subset) of the operation. It must exist or have been initialized before the operation.
A string specifying storage parameters to be applied in creating rasterBlob. The only supported storageParam keywords supported for this procedure are celldepth, compression, interleaving, and quality; all other keywords are ignored. Storage parameters are explained in Section 1.4.1.
If storageParam is null or not specified, the cell depth, interleaving, and compression type (and compression quality, if applicable) are the same as for the input GeoRaster object.
Usage Notes
If the window parameter data type is SDO_GEOMETRY, the SDO_SRID value must be one of the following:
Null, to specify raster space
A value from the SRID column of the MDSYS.CS_SRS table
If the SDO_SRID values for the window parameter geometry and the model space are different, the window parameter geometry is automatically transformed to the coordinate system of the model space before the operation is performed. (Raster space and model space are explained in Section 1.3.)
After the procedure completes, the rasterBLOB parameter contains the cell (pixel) data in the cropped window without tiling. The BLOB has no padding, except when the cell depth is less than 8 bits and the total number of bits needed for the output cannot be divided by 8; in these cases, unlike normal padding, only the last byte of the result is padded with 0 (zeros) for the trailing bits.
You can specify compression even if the input GeoRaster object is not compressed or is compressed in a different format from what you specify in the storageParam parameter. To have decompressed output for a compressed input GeoRaster object, specify compression=NONE in the storageParam parameter. For information about GeoRaster compression and decompression, see Section 1.8.
Examples
The following example creates a BLOB object with all raster data from a specified window in pyramid level 0 of the GeoRaster object whose ID value is 4 in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
DECLARE gr sdo_georaster; lb blob; BEGIN SELECT georaster INTO gr FROM georaster_table WHERE georid=4; dbms_lob.createTemporary(lb, FALSE); sdo_geor.getRasterSubset(gr, 0, sdo_number_array(-21,100,100,200), null, lb); dbms_lob.freeTemporary(lb); END; /
Format
SDO_GEOR.getScaling(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the coefficients of the scaling function for a layer of a GeoRaster object.
Note:
GeoRaster does not perform operations using the scaling function in the current release.Parameters
GeoRaster object.
Number of the layer for which to return the coefficients. A value of 0 (zero) indicates the object layer.
Usage Notes
The scaling function is as follows:
value = (a0 + a1 * cellvalue) / (b0 + b1 * cellvalue)
The order of the coefficients is: a0, a1, b0, b1.
Examples
The following example returns the scaling coefficients for layer number 0 (the whole object) of a specified GeoRaster object in a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. It scales original value range 0.0 to 1000.0 to be in the range 0.0 to 250.0.
SELECT sdo_geor.getScaling(georaster, 0) FROM georaster_table WHERE georid=0; SDO_GEOR.GETSCALING(GEORASTER,0) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(0.0, 0.25, 1, 0.0)
Format
SDO_GEOR.getSpatialDimNumber(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the number of spatial dimensions of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
For the current release, this function always returns 2.
To return the number of cells in each spatial dimension of a GeoRaster object, use the SDO_GEOR.getSpatialDimSizes function.
Examples
The following example returns the GEORID column value, the number of spatial dimensions, and the number of cells in each spatial dimension for the GeoRaster objects in the table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. (The output is reformatted for readability.)
SELECT georid, sdo_geor.getSpatialDimNumber(georaster) spatialDim,
sdo_geor.getSpatialDimSizes(georaster) spatialDimSizes
FROM georaster_table;
GEORID SPATIALDIM SPATIALDIMSIZES
---------- ---------- --------------------------------------------------------
0 2 SDO_NUMBER_ARRAY(1024, 1024)
1 2 SDO_NUMBER_ARRAY(384, 251)
2 2 SDO_NUMBER_ARRAY(512, 512)
4 2 SDO_NUMBER_ARRAY(512, 512)
11 2 SDO_NUMBER_ARRAY(7957, 5828)
Format
SDO_GEOR.getSpatialDimSizes(
georaster IN SDO_GEORASTER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the number of cells in each spatial dimension of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
To return the number of spatial dimensions for a GeoRaster object, use the SDO_GEOR.getSpatialDimNumber function.
Examples
The following example returns the spatial dimension sizes and the number of bands for a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT sdo_geor.getSpatialDimSizes(georaster) spatialDimSizes,
sdo_geor.getBandDimSize(georaster) bandDimSize
FROM georaster_table WHERE georid=21;
SPATIALDIMSIZES BANDDIMSIZE
-------------------------- -----------
SDO_NUMBER_ARRAY(512, 512) 1
Format
SDO_GEOR.getSpatialResolutions(
georaster IN SDO_GEORASTER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns the spatial resolution value along each spatial dimension of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
Each value indicates the number of units of measurement associated with the data area represented by that spatial dimension of a pixel. For example, if the spatial resolution values are (10,10) and the unit of measurement for the ground data is meters, each pixel represents an area of 10 meters by 10 meters.
The spatial resolutions may be inconsistent with the georeferencing information, especially when the GeoRaster object is not georectified. You can use the SDO_GEOR.setSpatialResolutions procedure to set the spatial resolutions to be the average resolutions for an image or the resolutions when the data was collected. In this case, georeferencing information should be used for precise measurement.
Examples
The following example returns the spatial resolution values along the column and row (X and Y) dimensions of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getSpatialResolutions(georaster) spatialResolution FROM georaster_table WHERE georid=42; SPATIALRESOLUTION -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(28.5, 28.5)
Format
SDO_GEOR.getSpectralResolution(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the spectral resolution of a GeoRaster object if it is a hyperspectral or multiband image.
Parameters
GeoRaster object.
Usage Notes
Taken together, the spectral unit and spectral resolution identify the wavelength interval for a band. For example, if the spectral resolution value is 2 and the spectral unit value is MILLIMETER, the wavelength interval for a band is 2 millimeters.
To set the spectral resolution for a GeoRaster object, use the SDO_GEOR.setSpectralResolution procedure.
Examples
The following example returns the spectral unit and spectral resolution for all spatially referenced GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, substr(sdo_geor.getSpectralUnit(georaster),1,20) spectralUnit,
sdo_geor.getSpectralResolution(georaster) spectralResolution
FROM georaster_table
WHERE sdo_geor.isSpatialReferenced(georaster)='TRUE';
GEORID SPECTRALUNIT SPECTRALRESOLUTION
---------- -------------------- ------------------
4 MILLIMETER 0.075
Format
SDO_GEOR.getSpectralUnit(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the unit of measurement for identifying the wavelength interval for a band.
Parameters
GeoRaster object.
Usage Notes
This function can return one of the following values: METER, MILLIMETER, MICROMETER, NANOMETER.
Taken together, the spectral unit and spectral resolution identify the wavelength interval for a band. For example, if the spectral resolution value is 2 and the spectral unit value is MILLIMETER, the wavelength interval for a band is 2 millimeters.
To set the spectral unit for a GeoRaster object, use the SDO_GEOR.setSpectralUnit procedure.
Examples
The following example returns the spectral unit and spectral resolution for all spatially referenced GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, substr(sdo_geor.getSpectralUnit(georaster),1,20) spectralUnit,
sdo_geor.getSpectralResolution(georaster) spectralResolution
FROM georaster_table
WHERE sdo_geor.isSpatialReferenced(georaster)='TRUE';
GEORID SPECTRALUNIT SPECTRALRESOLUTION
---------- -------------------- ------------------
4 MILLIMETER 0.075
Format
SDO_GEOR.getSRS(
georaster IN SDO_GEORASTER
) RETURN SDO_GEOR_SRS;
Description
Returns an object of type SDO_GEOR_SRS containing information related to the spatial referencing of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The SDO_GEOR_SRS object type is described in Section 2.3.5.
Examples
The following example returns information related to the spatial referencing of all spatially referenced GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getSRS(georaster) SRS
FROM georaster_table
WHERE sdo_geor.isSpatialReferenced(georaster)='TRUE';
GEORID
----------
SRS(ISREFERENCED, ISRECTIFIED, ISORTHORECTIFIED, SRID, SPATIALRESOLUTION, SPATIA
--------------------------------------------------------------------------------
4
SDO_GEOR_SRS('TRUE', 'TRUE', NULL, 82262, SDO_NUMBER_ARRAY(28.5, 28.5), NULL, NU
LL, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, NULL, NULL, NULL, SDO_NUMBER_ARRAY(1, 2, 1, 3,
32631.5614, 0, -.03508772), SDO_NUMBER_ARRAY(1, 0, 0, 1, 1), SDO_NUMBER_ARRAY(1
, 2, 1, 3, -7894.7544, .035087719, 0), SDO_NUMBER_ARRAY(1, 0, 0, 1, 1))
Format
SDO_GEOR.getStatistics(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN SDO_NUMBER_ARRAY;
Description
Returns statistical data associated with a layer.
Parameters
GeoRaster object.
Number of the layer for which to return the statistics. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns statistical data described by the <statisticDatasetType> element in the GeoRaster metadata XML schema, which is described in Appendix A. The function returns an array with the following values: MIN, MAX, MEAN, MEDIAN, MODEVALUE, and STD.
To set the statistical data associated with a layer, use the SDO_GEOR.setStatistics procedure.
Examples
The following example returns statistical data for layer 1 of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getStatistics(georaster, 1) layer1 FROM georaster_table WHERE georid=4; LAYER1 -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(0, 255, 100, 127, 95, 25)
Format
SDO_GEOR.getTotalLayerNumber(
georaster IN SDO_GEORASTER
) RETURN NUMBER;
Description
Returns the total number of layers in a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
For information about layers, see Section 1.5.
Examples
The following example returns the total number of layers in each GeoRaster object (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
SELECT georid, sdo_geor.getTotalLayerNumber(georaster) totalLayerNumber
FROM georaster_table;
GEORID TOTALLAYERNUMBER
---------- ----------------
2 1
4 3
Format
SDO_GEOR.getULTCoordinate(
georaster IN SDO_GEORASTER
) RETURN SDO_NUMBER_ARRAY ;
Description
Returns the cell coordinates of the upper-left corner of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
This function returns two or three numbers. If it returns two numbers, they are row and column ordinates. If it returns three numbers, they are row, column, and band ordinates.
Examples
The following example returns the row, column, and band ordinates for the upper-left corner of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT sdo_geor.getULTCoordinate(georaster) FROM georaster_table WHERE georid=23; SDO_GEOR.GETULTCOORDINATE(GEORASTER) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(256, 0, 0)
Format
SDO_GEOR.getVAT(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Returns the name of the value attribute table (VAT) associated with a layer of a GeoRaster object.
Parameters
GeoRaster object.
Number of the layer for which to return the VAT. A value of 0 (zero) indicates the object layer.
Usage Notes
For more information about value attribute tables, see Section 1.2.3.
To set the name of the value attribute table to be associated with a layer of a GeoRaster object, use the SDO_GEOR.setVAT procedure.
Examples
The following example returns the value attribute tables for layers 0, 1, 2, and 3 of the GeoRaster objects (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1. The output is reformatted for readability.)
SELECT substr(sdo_geor.getVAT(georaster, 0),1,20) vatTable0,
substr(sdo_geor.getVAT(georaster, 1),1,20) vatTable1,
substr(sdo_geor.getVAT(georaster, 2),1,20) vatTable2,
substr(sdo_geor.getVAT(georaster, 3),1,20) vatTable3
FROM georaster_table WHERE georid=4;
VATTABLE0 VATTABLE1 VATTABLE2 VATTABLE3
-------------------- -------------------- -------------------- ----------------
VAT0 VAT1 VAT2 VAT1
Format
SDO_GEOR.getVersion(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the user-specified version of a GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
The version returned is in the format major-version.minor-version.
To set the user-specified version of a GeoRaster object, use the SDO_GEOR.setVersion procedure.
Examples
The following example returns the user-specified version of the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1. (The output is reformatted for readability.)
SELECT georid, sdo_geor.getVersion(georaster) version FROM georaster_table;
GEORID VERSION
---------- --------------------------------------------------------------------
2 10.1
4 9i.2
Format
SDO_GEOR.hasGrayScale(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Checks if a layer of a GeoRaster object has grayscale information.
Parameters
GeoRaster object.
Number of the layer to check. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns TRUE if the layer has grayscale information, or FALSE if the layer does not use grayscale representation. Section 2.3.3 describes grayscale display.
If the layer has grayscale information, you can get and set the grayscale mappings and the grayscale mapping table name. See the following: SDO_GEOR.getGrayScale and SDO_GEOR.getGrayScaleTable functions, and SDO_GEOR.setGrayScale and SDO_GEOR.setGrayScaleTable procedures.
Examples
The following example checks if layers 0 and 1 of a specified GeoRaster object (GEORASTER column) have grayscale information. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT substr(sdo_geor.hasGrayScale(georaster, 0),1,15) hasGrayScale0,
substr(sdo_geor.hasGrayScale(georaster, 1),1,15) hasGrayScale1
FROM georaster_table WHERE georid=4;
HASGRAYSCALE0 HASGRAYSCALE1
--------------- ---------------
TRUE FALSE
Format
SDO_GEOR.hasPseudoColor(
georaster IN SDO_GEORASTER,
layerNumber IN NUMBER
) RETURN VARCHAR2;
Description
Checks if a layer of a GeoRaster object has pseudocolor information.
Parameters
GeoRaster object.
Number of the layer to check. A value of 0 (zero) indicates the object layer.
Usage Notes
This function returns TRUE if the layer has pseudocolor information, or FALSE if the layer does not have pseudocolor information (that is, does not use pseudocolor representation). Section 2.3.2 describes colormaps and pseudocolor display.
If the layer has pseudocolor information, you can get and set the colormap and colormap table name. See the following: SDO_GEOR.getColorMap and SDO_GEOR.getColorMapTable functions, and SDO_GEOR.setColorMap and SDO_GEOR.setColorMapTable procedures.
Examples
The following example checks if layers 0 and 1 of a specified GeoRaster object (GEORASTER column) have pseudocolor information. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
SELECT substr(sdo_geor.hasPseudoColor(georaster, 0),1,15) hasPseudoColor0,
substr(sdo_geor.hasPseudoColor(georaster, 1),1,15) hasPseudoColor1
FROM georaster_table WHERE georid=4;
HASPSEUDOCOLOR0 HASPSEUDOCOLOR1
--------------- ---------------
FALSE TRUE
Format
SDO_GEOR.importFrom(
georaster IN OUT SDO_GEORASTER,
storageParam IN VARCHAR2,
r_sourceFormat IN VARCHAR2,
r_sourceType IN VARCHAR2,
r_sourceName IN VARCHAR2,
h_sourceFormat IN VARCHAR2 DEFAULT NULL,
h_sourceType IN VARCHAR2 DEFAULT NULL,
h_sourceName IN VARCHAR2 DEFAULT NULL);
or
SDO_GEOR.importFrom(
georaster IN OUT SDO_GEORASTER,
storageParam IN VARCHAR2,
r_sourceFormat IN VARCHAR2,
r_sourceBLOB IN BLOB,
h_sourceFormat IN VARCHAR2 DEFAULT NULL,
h_sourceCLOB IN CLOB DEFAULT NULL);
Description
Imports an image file or BLOB object into a GeoRaster object stored in the database.
Parameters
GeoRaster object to hold the result of the operation.
String containing storage parameters. The format and usage are as explained in Section 1.4.1. Currently, the keywords supported for this operation are:
blocking: FALSE causes the image to be stored as a single block. If the blocksize parameter is not specified, TRUE causes the image to be reblocked using the default reblocking parameter values: (256,256,B), where B is the total number of bands that the image contains. If the blocksize parameter is specified, blocking is automatically interpreted as TRUE.
blocksize: (See the explanation in Table 1-1 in Section 1.4.1.)
compression: (See the explanation in Table 1-1 in Section 1.4.1.) The default value is NONE, which causes the raw data to be loaded without any compression.
quality: (See the explanation in Table 1-1 in Section 1.4.1.)
spatialExtent: FALSE (the default) causes a spatial extent not to be generated; TRUE causes a spatial extent to be generated if the SRID is nonzero and matches the SRID of any existing spatial extent index.
Raster source format. Must be one of the following: TIFF, GIF, BMP, or PNG. (JPEG is not supported for this procedure; however, you can use the client-side GeoRaster loader tool, described in Section 1.10, to import a JPEG file.)
Type of source for the import operation. Must be FILE.
Source file name (with full path specification) if r_sourceType is FILE. If you are using this procedure only to load the world file into an existing GeoRaster object, specify a null value for this parameter.
Raster source object of type BLOB.
Geoheader source format. Must be WORLDFILE.
Geoheader type of source for the import operation. Must be FILE.
Geoheader source file name (with full path specification) if h_sourceType is FILE., and optionally an SRID value. To specify the SRID value, add it after the file name, separated by a comma. Example: '/mypath/mydir/worldfile.tfw,82934' (UNIX or Linux) or 'C:\mypath\mydir\worldfile.tfw,82934' (Windows)
Geoheader source as an object of type CLOB.
Usage Notes
For information about using this procedure or the GeoRaster loader tool to load raster data, see Section 3.4.
Before you load raster data, you may need to increase the Java pool size. See Section 3.3 for more information.
Specify values for the parameters with names that start with r_ and h_ only if the raster image and the geoheader are in separate files or objects.
This procedure can load an ESRI world file from a file or from a CLOB object.
This procedure does not support JPEG as a source file format. You can use the client-side GeoRaster loader tool, described in Section 1.10, to import a JPEG file.
This procedure does not support raster data that has a cell depth value of 2BIT or source multiband raster data with BIL and BSQ interleaving types.
The imported GeoRaster object has the BIP interleaving type.
Before you call this procedure, you must have read permission on the files to be imported or the directory that contains the files. The following example (run as user SYSTEM) grants read permission on a file to user HERMAN:
call dbms_java.grant_permission('HERMAN','SYS:java.io.FilePermission',
'sdo/demos/georaster/data/img1.tif', 'read' );
Examples
The following example initializes an empty GeoRaster object into which an external image in TIFF format is to be imported, and then imports the image.
DECLARE
geor SDO_GEORASTER;
BEGIN
-- Initialize an empty GeoRaster object into which the external image
-- is to be imported.
INSERT INTO georaster_table
values( 1, 'TIFF', sdo_geor.init('rdt_1') );
-- Import the TIFF image.
SELECT georaster INTO geor FROM georaster_table
WHERE georid = 1 FOR UPDATE;
sdo_geor.importFrom(geor, NULL, 'TIFF', 'file',
'sdo/demos/georaster/data/img1.tif');
UPDATE georaster_table SET georaster = geor WHERE georid = 1;
COMMIT;
END;/
The following example imports images from a BLOB and an ESRI world file from a CLOB.
CREATE TABLE blob_table (blob_col BLOB, blobid NUMBER unique, clob_col CLOB);
INSERT INTO blob_table VALUES (empty_blob(), 1, null);
INSERT INTO blob_table VALUES (empty_blob(), 2, empty_clob());
COMMIT;
DECLARE
geor1 SDO_GEORASTER;
lobd1 BLOB;
lobd2 CLOB;
fileName VARCHAR2(1024);
file BFILE;
wfile BFILE;
wfname VARCHAR2(1024);
amt INTEGER;
amt1 INTEGER;
BEGIN
-- Import BLOB into georaster object.
-- First, if appropriate, load an existing image file into a BLOB object.
EXECUTE IMMEDIATE 'CREATE DIRECTORY blob_test_one AS '''/xyz'''';
fileName := '/parrot.tif';
file := BFILENAME('BLOB_TEST_ONE', fileName);
wfname := '/parrot.tfw';
wfile := BFILENAME('BLOB_TEST_ONE', wfname);
SELECT clob_col into lobd2 from blob_table WHERE blobid = 2 for update;
SELECT blob_col into lobd1 from blob_table WHERE blobid = 2 for update;
dbms_lob.fileopen(file, dbms_lob.file_readonly);
dbms_lob.fileopen(wfile, dbms_lob.file_readonly);
amt1 := dbms_lob.getLength(wfile);
dbms_lob.loadfromfile(lobd1, file, amt);
dbms_lob.loadfromfile(lobd2, wfile, amt1);
COMMIT;
dbms_lob.fileclose(file);
dbms_lob.fileclose(wfile);
-- Then, import this BLOB into a georaster object.
SELECT georaster INTO geor1 from georaster_table WHERE georid = 14 for update;
sdo_geor.importFrom(geor1,'', 'TIFF', lobd1, 'WORLDFILE', lobd2);
sdo_geor.setModelSRID(geor1, 82394);
UPDATE georaster_table SET georaster = geor1 WHERE georid = 14;
COMMIT;
END;
/
Format
SDO_GEOR.init(
rasterDataTable IN VARCHAR2 DEFAULT NULL,
rasterID IN NUMBER DEFAULT NULL
) RETURN SDO_GEORASTER;
Description
Initializes an empty GeoRaster object, which will be registered by GeoRaster in the xxx_SDO_GEOR_SYSDATA views (described in Section 2.4).
Parameters
Name of the object table of type SDO_RASTER that stores the cell data blocks. If you do not specify this parameter, GeoRaster generates a unique table name to be used for the raster data table. If you specify this parameter and the table already exists but is not an object table of type SDO_RASTER, an exception is raised.
Number that uniquely identifies the blocks of this GeoRaster object in its raster data table. If you do not specify this parameter, a unique sequence number is generated for the ID.
Usage Notes
This function returns an empty SDO_GEORASTER object with its rasterDataTable and rasterID attributes set. All other attributes of the SDO_GEORASTER object are null.
This function does not require that the specified raster data table exist. However, the table must exist before any data can be inserted into it, and you must create the table.
If a table has multiple GeoRaster object columns, and if for each column you plan to call the SDO_GEOR.init or SDO_GEOR.createBlank function with identical parameter values that contain a null rasterDataTable or rasterID parameter value, do not try to use the SDO_GEOR.init or SDO_GEOR.createBlank function on all such columns with a single INSERT or UPDATE statement. For example, assuming a table named LSAT_TABLE containing the columns (georid NUMBER, type VARCHAR2(32), image_date VARCHAR2(32), image_15m SDO_GEORASTER, image_30m SDO_GEORASTER, image_60m SDO_GEORASTER), do not use a statement like the following:
INSERT INTO lsat_table VALUES(1, 'L1G', '2004-02-25',
sdo_geor.init('RDT_1'), sdo_geor.init('RDT_1'),
sdo_geor.init('RDT_1'));
Instead, in cases such as this, do either of the following:
Always specify a rasterID parameter value when calling the function. The following example specifies raster ID values of 1, 2, and 3 for the GeoRaster objects being inserted into the last three columns:
INSERT INTO lsat_table VALUES(1, 'L1G', '2004-02-25',
sdo_geor.init('RDT_1', 1), sdo_geor.init('RDT_1', 2),
sdo_geor.init('RDT_1', 3));
Use the function with only one GeoRaster object with each INSERT or UPDATE statement. The following example inserts a row initializing one GeoRaster object column and specifying the other two as null, and then updates the row twice to initialize the second and third GeoRaster object columns:
INSERT INTO lsat_table VALUES(1, 'L1G', '2004-02-25',
sdo_geor.init('RDT_1'), null, null);
UPDATE lsat_table SET image_30m = sdo_geor.init('RDT_1')
WHERE georid = 1;
UPDATE lsat_table SET image_60m = sdo_geor.init('RDT_1')
WHERE georid = 1;
Examples
The following example inserts an initialized GeoRaster object into the GEORASTER_TABLE table. The raster data table associated with the GeoRaster object is RDT_1. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
INSERT INTO georaster_table (georid, georaster)
VALUES (1, sdo_geor.init('RDT_1'));
Format
SDO_GEOR.isBlank(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the string TRUE if the GeoRaster object is a blank GeoRaster object, or FALSE if the GeoRaster object is not a blank GeoRaster object.
Parameters
GeoRaster object.
Usage Notes
In a blank GeoRaster object, all cells have the same cell value.
To change the cell value of an existing blank GeoRaster object, use the SDO_GEOR.setBlankCellValue procedure. To return the cell value of a specified GeoRaster object, use the SDO_GEOR.getBlankCellValue function.
Examples
The following example determines whether or not each GeoRaster object in the GEORASTER column of the GEORASTER_TABLE table is a blank GeoRaster object. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
SELECT georid, substr(sdo_geor.isBlank(georaster),1,7) isBlank
FROM georaster_table;
GEORID ISBLANK
---------- -------
2 FALSE
4 FALSE
Format
SDO_GEOR.isOrthoRectified(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the string TRUE if the GeoRaster object is identified as orthorectified, or FALSE if the GeoRaster object is not identified as orthorectified.
Parameters
GeoRaster object.
Usage Notes
This function checks the GeoRaster metadata for the object to see if it is specified as orthorectified. It does not check if the object is actually orthorectified. Users are responsible for validating the GeoRaster object and ensuring that orthorectification is performed.
To specify that a GeoRaster object is orthorectified, use the SDO_GEOR.setOrthoRectified procedure.
Examples
The following example checks if the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table are specified as spatially referenced, rectified, and orthorectified. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
SELECT georid, substr(sdo_geor.isSpatialReferenced(georaster),1,20)
isSpatialReferenced,
substr(sdo_geor.isRectified(georaster),1,20) isRectified,
substr(sdo_geor.isOrthoRectified(georaster),1,20) isOrthoRectified
FROM georaster_table;
GEORID ISSPATIALREFERENCED ISRECTIFIED ISORTHORECTIFIED
---------- -------------------- -------------------- --------------------
2 TRUE TRUE TRUE
4 TRUE TRUE FALSE
Format
SDO_GEOR.isRectified(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the string TRUE if the GeoRaster object is identified as rectified, or FALSE if the GeoRaster object is not identified as rectified.
Parameters
GeoRaster object.
Usage Notes
This function checks the GeoRaster metadata for the object to see if it is specified as rectified. Users are responsible for validating the GeoRaster object and ensuring that rectification is performed.
To specify that a GeoRaster object is rectified, use the SDO_GEOR.setRectified procedure.
Examples
The following example checks if the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table are specified as spatially referenced, rectified, and orthorectified. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
SELECT georid, substr(sdo_geor.isSpatialReferenced(georaster),1,20)
isSpatialReferenced,
substr(sdo_geor.isRectified(georaster),1,20) isRectified,
substr(sdo_geor.isOrthoRectified(georaster),1,20) isOrthoRectified
FROM georaster_table;
GEORID ISSPATIALREFERENCED ISRECTIFIED ISORTHORECTIFIED
---------- -------------------- -------------------- --------------------
2 TRUE TRUE TRUE
4 TRUE TRUE FALSE
Format
SDO_GEOR.isSpatialReferenced(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Returns the string TRUE if the GeoRaster object is spatially referenced, or FALSE if the GeoRaster object is not spatially referenced.
Parameters
GeoRaster object.
Usage Notes
The GeoRaster object must have been validated.
Examples
The following example checks if the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table are specified as spatially referenced, rectified, and orthorectified. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
SELECT georid, substr(sdo_geor.isSpatialReferenced(georaster),1,20)
isSpatialReferenced,
substr(sdo_geor.isRectified(georaster),1,20) isRectified,
substr(sdo_geor.isOrthoRectified(georaster),1,20) isOrthoRectified
FROM georaster_table;
GEORID ISSPATIALREFERENCED ISRECTIFIED ISORTHORECTIFIED
---------- -------------------- -------------------- --------------------
2 TRUE TRUE TRUE
4 TRUE TRUE FALSE
Format
SDO_GEOR.mosaic(
georasterTableName IN VARCHAR2,
georasterColumnName IN VARCHAR2,
georaster IN OUT SDO_GEORASTER,
storageParam IN VARCHAR2);
Description
Mosaics GeoRaster objects into one GeoRaster object.
Parameters
Name of the table containing all source GeoRaster objects.
Column of type SDO_GEORASTER in georasterTableName.
GeoRaster object to hold the result of the mosaic operation.
A string specifying storage parameters, as explained in Section 1.4.1. If this parameter is null, the resulting GeoRaster object has the same storage parameters (blockSize, cellDepth, interleaving, and compression) as the upper-left corner source GeoRaster object in the model space (if applicable) or cell space.
Usage Notes
The source GeoRaster objects must be prepared images or raster data, so that they can be mosaicked directly and seamlessly. The GeoRaster objects to be mosaicked must:
Be rectified and have the same SRID value and spatial resolutions (if they are georeferenced) or have different ULT coordinates (if they are not georeferenced). Either all of the objects are georeferenced, or none of the objects are georeferenced; there cannot be a mixture of georeferenced and nongeoreferenced objects.
Completely cover the mosaic area, and not overlap or have any gaps.
Have the same number of layers or bands, and be spatially aligned along row and column dimensions. There is no restriction on the row and column dimension sizes of the source objects; for example, they do not need to be a power of 2.
Have the same mapping between band number and layers.
If applicable, the resulting GeoRaster object takes the spatial reference metadata information from the upper-left corner source GeoRaster object in the model space.
If all source GeoRaster objects are blank and have the same blankCellValue value, the resulting GeoRaster object is blank and has that blankCellValue value; otherwise, the resulting GeoRaster object is not blank.
Any pyramid data for the source GeoRaster objects is not considered, and the pyramid parameter is ignored if it is specified in the storageParam string.
The mosaic operation performs internal commit operations at regular intervals, and thus it cannot be rolled back. If the operation is interrupted, dangling raster blocks may exist in the raster data table. You can handle dangling raster blocks, as explained in Section 3.20.
Examples
The following example inserts an initialized GeoRaster object into the GEORASTER_TABLE table, returns the GeoRaster object into a variable named gr, mosaics all the GeoRaster objects in the GROBJ column of a table named GRTAB, and stores the resulting mosaicked GeoRaster object in the same variable. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1. The GRTAB table definition is not important to the example and is not presented here.)
DECLARE
gr sdo_georaster;
BEGIN
INSERT INTO georaster_table (georid, georaster)
VALUES (12, sdo_geor.init('rdt_1'))
RETURNING georaster INTO gr;
sdo_geor.mosaic('grtab', 'grobj', gr, 'blocksize=(512,512,1)');
UPDATE georaster_table SET georaster=gr WHERE id=12;
END;
/
Format
SDO_GEOR.scale(
inGeoraster IN OUT SDO_GEORASTER,
scaleParam IN VARCHAR2,
resampleParam IN VARCHAR2,
storageParam IN VARCHAR2);
Description
Scales a GeoRaster object by enlarging or reducing the image along row and column dimensions.
Note:
This procedure is deprecated. Instead, use the SDO_GEOR.scaleCopy procedure, which makes a copy of an existing GeoRaster object using the specified scaling information.Parameters
The SDO_GEORASTER object on which the scaling operation is to be performed.
A string specifying a scaling parameter keyword and its associated value. The keyword must be one of the following:
scaleFactor, to reduce or enlarge as a multiple of the original size. This keyword must have a numeric value greater than 0 (zero) (for example, 'scaleFactor=0.75'). A value of 1.0 will not change the current size; a value less than 1 will reduce the image; a value greater than 1 will enlarge the image. The number of cells along each dimension is the original number multiplied by scaleFactor. For example, if the scaleFactor value is 2 and the GeoRaster object has X and Y dimensions, the number of cells along each dimension is doubled.
maxDimSize, to specify a size in terms of the maximum number of cells for each dimension. This keyword must have a numeric value for each dimension (for example, 'maxDimSize=(512,512)'). The aspect ratio is not changed.
A string specifying a resampling parameter (for example, 'resampling=NN'). For the current release, the only supported keyword is resampling, and its value must be one of the following:
NN: value of the nearest neighbor cell in the original GeoRaster object
BILINEAR: distance-weighted average of the 4 nearest cells in the original GeoRaster object
AVERAGE4: simple average of the 4 nearest cells in the original GeoRaster object
AVERAGE16: simple average of the 16 nearest cells in the original GeoRaster object
CUBIC: cubic convolution of the 16 nearest cells in the original GeoRaster object
A string specifying storage parameters, as explained in Section 1.4.1. However, the compression keyword is not supported in the storageParam parameter for this procedure, while it is supported for the SDO_GEOR.scaleCopy procedure.
Usage Notes
This procedure, which changes the input GeoRaster object to reflect the specified scaling, is deprecated and will not be supported in a future release of Spatial. Instead, use the SDO_GEOR.scaleCopy procedure. After you use the SDO_GEOR.scaleCopy procedure, you can check to ensure that the desired changes were made in the copy of the original GeoRaster object, and then discard the original GeoRaster object if you wish.
This procedure does not scale along the band dimension.
If you need to get the scaled cell values, use the procedure described in the Usage Notes for the SDO_GEOR.getCellValue function.
Any pyramid data in the GeoRaster object is deleted as a result of the scaling operation.
After the operation, the row and column ULT coordinates are always set to 0 (zero), even if no scaling is performed (that is, even if scaleFactor=1).
If the metadata contains spatial reference information and if the GeoRaster object is georeferenced with a valid affine transformation, the spatial reference information is updated accordingly; otherwise, the spatial reference information is removed.
Examples
The following example reduces an image to three-fourths (0.75) size, specifies bilinear resampling, and specifies a block size of 64 for each dimension in the storage parameters. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
BEGIN
SELECT georaster INTO gr1 FROM georaster_table WHERE georid=21 FOR UPDATE;
sdo_geor.scale(gr1, 'scaleFactor=0.75', 'resampling=BILINEAR',
'blocksize=(64,64)');
UPDATE georaster_table SET georaster=gr1 WHERE georid=21;
COMMIT;
END;
/
Format
SDO_GEOR.scaleCopy(
inGeoraster IN SDO_GEORASTER,
scaleParam IN VARCHAR2,
resampleParam IN VARCHAR2,
storageParam IN VARCHAR2,
outGeoraster IN OUT SDO_GEORASTER);
Description
Scales a GeoRaster object by enlarging or reducing the image along row and column dimensions, and puts the result into a new object that reflects the scaling.
Parameters
The SDO_GEORASTER object on which the scaling operation is to be performed to create the new object (outGeoraster).
A string specifying a scaling parameter keyword and its associated value. The keyword must be one of the following:
scaleFactor, to reduce or enlarge as a multiple of the original size. This keyword must have a numeric value greater than 0 (zero) (for example, 'scaleFactor=0.75'). A value of 1.0 will not change the current size; a value less than 1 will reduce the image; a value greater than 1 will enlarge the image. The number of cells along each dimension is the original number multiplied by scaleFactor. For example, if the scaleFactor value is 2 and the GeoRaster object has X and Y dimensions, the number of cells along each dimension is doubled.
maxDimSize, to specify a size in terms of the maximum number of cells for each dimension. This keyword must have a numeric value for each dimension (for example, 'maxDimSize=(512,512)'). The aspect ratio is not changed.
A string specifying a resampling parameter (for example, 'resampling=NN'). For the current release, the only supported keyword is resampling, and its value must be one of the following:
NN: value of the nearest neighbor cell in the original GeoRaster object
BILINEAR: distance-weighted average of the 4 nearest cells in the original GeoRaster object
AVERAGE4: simple average of the 4 nearest cells in the original GeoRaster object
AVERAGE16: simple average of the 16 nearest cells in the original GeoRaster object
CUBIC: cubic convolution of the 16 nearest cells in the original GeoRaster object
A string specifying storage parameters, as explained in Section 1.4.1.
The new SDO_GEORASTER object that reflects the results of the scaling operation.
Usage Notes
Use this procedure to create a new GeoRaster object reflecting the specified scaling, without changing the original object. After you use this procedure, you can check to ensure that the desired changes were made in the copy of the original GeoRaster object, and then discard the original GeoRaster object if you wish.
This procedure does not scale along the band dimension.
If you need to get the scaled cell values, use the procedure described in the Usage Notes for the SDO_GEOR.getCellValue function.
Any pyramid data in the input GeoRaster object is not included in the output GeoRaster object.
After the operation, the row and column ULT coordinates are always set to 0 (zero), even if no scaling is performed (that is, even if scaleFactor=1).
If the metadata contains spatial reference information and if the GeoRaster object is georeferenced with a valid affine transformation, the spatial reference and georeferencing information is updated accordingly; otherwise, the spatial reference information is removed.
An exception is raised if one or more of the following are true:
inGeoraster is invalid.
outGeoraster has not been initialized.
A raster data table for outGeoraster does not exist and outGeoraster is not a blank GeoRaster object.
Examples
The following example reduces an image to three-fourths (0.75) size, specifies AVERAGE4 resampling, and specifies a block size of 32 for each dimension in the storage parameters. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
gr2 sdo_georaster;
BEGIN
INSERT INTO georaster_table (georid, georaster)
VALUES (21, sdo_geor.init('RDT_1'))
RETURNING georaster INTO gr2;
SELECT georaster INTO gr1 FROM georaster_table WHERE georid=2;
sdo_geor.scaleCopy(gr1, 'scaleFactor=0.75', 'resampling=AVERAGE4',
'blocksize=(32,32)', gr2);
UPDATE georaster_table SET georaster=gr2 WHERE georid=21;
COMMIT;
END;
/
Format
SDO_GEOR.schemaValidate(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Validates a GeoRaster object's metadata against the GeoRaster XML schema.
Parameters
GeoRaster object.
Usage Notes
This function returns TRUE if the metadata is valid, NULL if the GeoRaster object or its metadata is null, or one or more Oracle error codes indicating why the metadata is not valid and the exact location of the errors.
Use this function with the SDO_GEOR.validateGeoraster function. If the SDO_GEOR.validateGeoraster function identifies a GeoRaster object as invalid with an error code of 13454, the object's metadata is not valid according to the GeoRaster XML schema. If this happens, call the SDO_GEOR.schemaValidate function to get specific information, including the location in the metadata, about the errors.
Examples
The following example validates a GeoRaster object's metadata.
SELECT t.georid,
sdo_geor.schemavalidate(t.georaster)
FROM georaster_table t
WHERE t.georid = 1;
Format
SDO_GEOR.setBeginDateTime(
georaster IN OUT SDO_GEORASTER,
beginTime TIMESTAMP WITH TIME ZONE);
Description
Sets the beginning date and time for raster data collection in the metadata for a GeoRaster object, or deletes the existing value if you specify a null beginTime parameter.
Parameters
GeoRaster object.
Time specification.
Usage Notes
To see the current beginning date and time (if any) in the metadata for the GeoRaster object, use the SDO_GEOR.getBeginDateTime function.
An exception is raised if beginTime is later than the ending date and time specified in the metadata for the GeoRaster object (see the SDO_GEOR.setEndDateTime procedure).
The GeoRaster object is automatically validated after the operation completes.
Examples
The following example sets the beginning and ending dates and times for raster data collection in the metadata for a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setBeginDateTime(grobj, timestamp '2002-11-15 15:00:00'); sdo_geor.setEndDateTime(grobj, timestamp '2002-11-15 15:00:10'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setBinTable(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
tableName IN VARCHAR2);
Description
Sets the name of the bin table associated with a layer, or deletes the existing value if you specify a null tableName parameter.
Note:
GeoRaster does not perform operations using the BIN function or the bin table in the current release.Parameters
GeoRaster object.
Number of the layer for which to set the bin table name. A value of 0 (zero) indicates the object layer.
Name of the bin table associated with a layer.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
This procedure is relevant only if the bin type is EXPLICIT. To retrieve the bin type, use the SDO_GEOR.getBinType function.
To return the bin table for a layer, use the SDO_GEOR.getBinTable function.
See also the information in the Usage Notes for the SDO_GEOR.getBinType function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if tableName is an empty string ('').
Examples
The following example sets BINT1 as the name of the bin table for layer number 3 of a specified GeoRaster object in the GEORASTER_TABLE table, whose definition is presented after Example 1-1 in Section 1.4.1.
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setBinTable(grobj, 3, 'BINT1'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setBlankCellValue(
georaster IN OUT SDO_GEORASTER,
value IN NUMBER);
Description
Sets (modifies) the cell value to be used for all cells if a specified GeoRaster object is a blank GeoRaster object.
Parameters
GeoRaster object.
Cell value to be used for the blank GeoRaster object. Cannot be a null value.
Usage Notes
In a blank GeoRaster object, all cells have the same cell value.
The GeoRaster object is automatically validated after the operation completes.
To return the blank cell value of a blank GeoRaster object, use the SDO_GEOR.getBlankCellValue function. To determine if a specified GeoRaster object is a blank GeoRaster object, use the SDO_GEOR.isBlank function.
An exception is raised if value is null or inconsistent with the cellDepth specification, or if the GeoRaster object is not blank.
Examples
The following example specifies a value of 255 to be used for all cells in the GeoRaster object column (GEORASTER) in the GEORASTER_TABLE table for the row with an GEORID column value of 1. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=1 FOR UPDATE; sdo_geor.setBlankCellValue(grobj, 255); UPDATE georaster_table SET georaster = grobj WHERE georid=1; COMMIT; END; /
Format
SDO_GEOR.setColorMap(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
colorMap IN SDO_GEOR_COLORMAP);
Description
Sets the colormap for a layer in a GeoRaster object, or deletes the existing value if you specify a null colorMap parameter.
Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
Colormap object of type SDO_GEOR_COLORMAP, which is described in Section 2.3.2.
Usage Notes
The following must be true of the specified colormap object:
The cellValue values are consistent with and in the value range for the cellDepth value of the GeoRaster object.
The red, green, blue, and alpha values are integers from 0 to 255.
The cellValue array contains no duplicate entries.
The entries in the cellValue array are in ascending order.
The GeoRaster object is automatically validated after the operation completes.
You can create a colormap or retrieve a colormap from an existing GeoRaster object for use. To return the colormap for a layer in a GeoRaster object, use the SDO_GEOR.getColorMap function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if any of the following exist in colorMap: the red, green, blue, or alpha value is null or out of scope; duplicate values exist in the cellValue array, or any cellValue values are null, out of scope, or out of order.
Examples
The following example sets the colormap for layer 2 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. It assumes that the GeoRaster object is a bitmap. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
grobj sdo_georaster;
cmobj sdo_geor_colormap;
BEGIN
cmobj := sdo_geor_colormap(sdo_number_array(0, 1),
sdo_number_array(0, 255),
sdo_number_array(0, 0),
sdo_number_array(0, 0),
sdo_number_array(255, 255));
SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE;
sdo_geor.setColorMap(grobj, 2, cmobj);
UPDATE georaster_table SET georaster = grobj WHERE georid=4;
COMMIT;
END;
/
Format
SDO_GEOR.setColorMapTable(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
tableName IN VARCHAR2);
Description
Sets the colormap table for a layer in a GeoRaster object, or deletes the existing value if you specify a null tableName parameter.
Note:
This procedure registers the colormap table name with GeoRaster; however, GeoRaster does not perform operations using the colormap table in the current release.Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
Name of the user-defined colormap table. Section 2.3.2 describes colormaps.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
To return the colormap table for a layer in a GeoRaster object, use the SDO_GEOR.getColorMapTable function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if tableName is an empty string ('').
Examples
The following example sets the colormap table to be null for layer 2 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setColorMapTable(grobj, 2, null); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setDefaultBlue(
georaster IN OUT SDO_GEORASTER,
defaultBlue NUMBER);
Description
Sets the number of the layer to be used for the blue color component (in the RGB color space) for displaying a GeoRaster object, or deletes the existing value if you specify a null defaultBlue parameter.
Parameters
GeoRaster object.
Number of the layer to be used for the blue color component (in the RGB color space) for displaying the specified GeoRaster object. Must be greater than 0 (zero) and less than or equal to the highest layer number in the GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
The GeoRaster object is automatically validated after the operation completes.
An exception is raised if you are trying to set or remove the number of the layer to be used for the blue color component only, or if defaultBlue is not a valid layer number for the GeoRaster object.
Examples
The following example sets the default red, green, and blue color layers for the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, and it returns an array with the layer numbers for the red, green, and blue color components for displaying these GeoRaster objects. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setDefaultRed(grobj, 5); sdo_geor.setDefaultGreen(grobj, 4); sdo_geor.setDefaultBlue(grobj, 3); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; / SELECT sdo_geor.getDefaultColorLayer(georaster) FROM georaster_table WHERE georid=4; SDO_GEOR.GETDEFAULTCOLORLAYER(GEORASTER) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(5, 4, 3) 1 row selected.
Format
SDO_GEOR.setDefaultColorLayer(
georaster IN OUT SDO_GEORASTER,
defaultRGB SDO_NUMBER_ARRAY);
Description
Sets the default numbers of the layers to be used for the red, green, and blue color components, respectively, for displaying a GeoRaster object, or deletes the existing values if you specify a null defaultRGB parameter.
Parameters
GeoRaster object.
Array of three numbers identifying the red, green, and blue color components, respectively, for displaying the specified GeoRaster object. Each number must be greater than 0 (zero) and less than or equal to the highest layer number in the GeoRaster object.
Usage Notes
The RGB layer numbers specified are used for true-color displays, not for pseudocolor or grayscale displays.
The GeoRaster object is automatically validated after the operation completes.
You can set the layer number for each color component (RGB) by using the SDO_GEOR.setDefaultRed, SDO_GEOR.setDefaultGreen, and SDO_GEOR.setDefaultBlue procedures.
An exception is raised if defaultRGB is of the wrong size or if any elements in it are null or are invalid layer numbers for the GeoRaster object. All elements in the defaultRGB array must be either null or not null; you cannot mix null and non-null array elements, because the three layer numbers must be set or removed at the same time.
Examples
The following example specifies that layer number 1 is to be used for the red, green, and blue color components for displaying the GeoRaster object (GEORASTER column) in the row with an GEORID column value of 2 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=2 FOR UPDATE; sdo_geor.setDefaultColorLayer(grobj, sdo_number_array(1,1,1)); UPDATE georaster_table SET georaster = grobj WHERE georid=2; COMMIT; END; /
Format
SDO_GEOR.setDefaultGreen(
georaster IN OUT SDO_GEORASTER,
defaultGreen NUMBER);
Description
Sets the number of the layer to be used for the green color component (in the RGB color space) for displaying a GeoRaster object, or deletes the existing value if you specify a null defaultGreen parameter.
Parameters
GeoRaster object.
Number of the layer to be used for the green color component (in the RGB color space) for displaying the specified GeoRaster object. Must be greater than 0 (zero) and less than or equal to the highest layer number in the GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
The GeoRaster object is automatically validated after the operation completes.
An exception is raised if you are trying to set or remove the number of the layer to be used for the green color component only, or if defaultGreen is not a valid layer number for the GeoRaster object.
Examples
The following example sets the default red, green, and blue color layers for the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, and it returns an array with the layer numbers for the red, green, and blue color components for displaying these GeoRaster objects. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setDefaultRed(grobj, 5); sdo_geor.setDefaultGreen(grobj, 4); sdo_geor.setDefaultBlue(grobj, 3); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; / SELECT sdo_geor.getDefaultColorLayer(georaster) FROM georaster_table WHERE georid=4; SDO_GEOR.GETDEFAULTCOLORLAYER(GEORASTER) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(5, 4, 3) 1 row selected.
Format
SDO_GEOR.setDefaultRed(
georaster IN OUT SDO_GEORASTER,
defaultRed IN NUMBER);
Description
Sets the number of the layer to be used for the red color component (in the RGB color space) for displaying a GeoRaster object, or deletes the existing value if you specify a null defaultRed parameter.
Parameters
GeoRaster object.
Number of the layer to be used for the red color component (in the RGB color space) for displaying the specified GeoRaster object. Must be greater than 0 (zero) and less than or equal to the highest layer number in the GeoRaster object.
Usage Notes
The default red, green, and blue values are used for true-color displays, not for pseudocolor or grayscale displays. These values are optional, and they are intended for use only when visualizing multilayer or hyperspectral GeoRaster objects.
The GeoRaster object is automatically validated after the operation completes.
An exception is raised if you are trying to set or remove the number of the layer to be used for the red color component only, or if defaultRed is not a valid layer number for the GeoRaster object.
Examples
The following example sets the default red, green, and blue color layers for the GeoRaster objects (GEORASTER column) in the GEORASTER_TABLE table, and it returns an array with the layer numbers for the red, green, and blue color components for displaying these GeoRaster objects. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setDefaultRed(grobj, 5); sdo_geor.setDefaultGreen(grobj, 4); sdo_geor.setDefaultBlue(grobj, 3); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; / SELECT sdo_geor.getDefaultColorLayer(georaster) FROM georaster_table WHERE georid=4; SDO_GEOR.GETDEFAULTCOLORLAYER(GEORASTER) -------------------------------------------------------------------------------- SDO_NUMBER_ARRAY(5, 4, 3) 1 row selected.
Format
SDO_GEOR.setEndDateTime(
georaster IN OUT SDO_GEORASTER,
endTime TIMESTAMP WITH TIME ZONE);
Description
Sets the ending date and time for raster data collection in the metadata for a GeoRaster object, or deletes the existing value if you specify a null endTime parameter.
Parameters
GeoRaster object.
Time specification.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
To see the current ending date and time (if any) in the metadata for the GeoRaster object, use the SDO_GEOR.getEndDateTime function.
An exception is raised if endTime is earlier than the beginning date and time specified in the metadata for the GeoRaster object (see the SDO_GEOR.setBeginDateTime procedure).
Examples
The following example sets the beginning and ending dates and times for raster data collection in the metadata for a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setBeginDateTime(grobj, timestamp '2002-11-15 15:00:00'); sdo_geor.setEndDateTime(grobj, timestamp '2002-11-15 15:00:10'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setGrayScale(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
grayScale IN SDO_GEOR_GRAYSCALE);
Description
Sets the grayscale mappings for a layer in a GeoRaster object, or deletes the existing values if you specify a null grayScale parameter.
Parameters
GeoRaster object.
Number of the layer for which to set the grayscale mappings. A value of 0 (zero) indicates the object layer.
An object of type SDO_GEOR_GRAYSCALE, which is described in Section 2.3.3.
Usage Notes
The following must be true of the specified SDO_GEOR_GRAYSCALE object:
The cellValue values are consistent with and in the value range for the cellDepth value of the GeoRaster object.
The gray value is an integer from 0 to 255.
The cellValue array contains no duplicate entries.
The entries in the cellValue array are in ascending order.
The GeoRaster object is automatically validated after the operation completes.
To return the grayscale mappings for a layer in a GeoRaster object, use the SDO_GEOR.getGrayScale function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, any gray values are null or out of scope, the cellValue array contains any duplicate values, or any cellValue values are null, out of scope, or out of order.
Examples
The following example sets the grayscale mappings for layer 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
grobj sdo_georaster;
gsobj sdo_geor_grayscale;
BEGIN
gsobj := sdo_geor_grayscale(sdo_number_array(1, 10, 20, 30, 255),
sdo_number_array(0, 180, 210, 230, 250));
SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE;
sdo_geor.setGrayScale(grobj, 3, gsobj);
UPDATE georaster_table SET georaster = grobj WHERE georid=4;
COMMIT;
END;
/
Format
SDO_GEOR.setGrayScaleTable(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
tableName IN VARCHAR2);
Description
Sets the grayscale mapping table for a layer in a GeoRaster object, or deletes the existing value if you specify a null tableName parameter.
Note:
This procedure registers the grayscale mapping table name with GeoRaster; however, GeoRaster does not perform operations using the grayscale mapping table in the current release.Parameters
GeoRaster object.
Number of the layer for which to set the grayscale mapping table. A value of 0 (zero) indicates the object layer.
Name of the grayscale mapping table for a layer in the specified GeoRaster object.
Usage Notes
Section 2.3.3 describes grayscale display.
The GeoRaster object is automatically validated after the operation completes.
To return the grayscale mapping table for a layer in a GeoRaster object, use the SDO_GEOR.getGrayScaleTable function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if tableName is an empty string ('').
Examples
The following example sets GST1 as the grayscale mapping table for layer 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setGrayScaleTable(grobj, 3, 'GST1'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setHistogramTable(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER
tableName IN VARCHAR2);
Description
Sets the histogram table for a layer in a GeoRaster object.
Note:
This procedure registers the histogram table name with GeoRaster; however, GeoRaster does not perform operations using the histogram table in the current release.Parameters
GeoRaster object.
Number of the layer for which to set the name of the histogram table. A value of 0 (zero) indicates the object layer.
Name of the histogram table. If this parameter is null, the metadata information for any existing histogram table (but not the actual table) is deleted. If there is no statistics information for the layer, this parameter must be null. The parameter value cannot be an empty string (that is, it cannot be '').
Usage Notes
This procedure specifies a user-defined histogram table. Section 2.3.1 briefly discusses histograms.
To return the name of the histogram table for a layer, use the SDO_GEOR.getHistogramTable function.
An exception is raised if one or more of the following are true:
layerNumber is null or invalid for the GeoRaster object,.
tableName is an empty string ('').
The statistical data associated with the specified layer is not set.
To set the statistical data for a layer, call the SDO_GEOR.setStatistics procedure.
Examples
The following example sets HIST1 as the histogram table for layer 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setHistogramTable(grobj, 3, 'HIST1'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setID(
georaster IN OUT SDO_GEORASTER,
id IN VARCHAR2);
Description
Sets a user-defined identifier to be associated with a GeoRaster object, or deletes the existing value if you specify a null id parameter.
Parameters
GeoRaster object.
ID value to be associated with the GeoRaster object.
Usage Notes
This procedure is useful for assigning unique meaningful alphanumeric identifiers to GeoRaster objects, so that users and applications can easily identify the objects.
The GeoRaster object is automatically validated after the operation completes.
To return the user-defined identifier value for a GeoRaster object, use the SDO_GEOR.getID function.
Examples
The following example sets newid as the user-defined identifier value of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 2 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=2 FOR UPDATE; sdo_geor.setID(grobj, 'newid'); UPDATE georaster_table SET georaster = grobj WHERE georid=2; COMMIT; END; /
Format
SDO_GEOR.setLayerID(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
id IN VARCHAR2);
Description
Sets a user-defined identifier to be associated with a layer in a GeoRaster object, or deletes the existing value if you specify a null id parameter.
Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
ID value to be associated with the specified layer in the GeoRaster object.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
To return the user-defined identifier value for a layer in a GeoRaster object, use the SDO_GEOR.getLayerID function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if id is null yet the corresponding layer information does exist.
Examples
The following example sets TM_Band_2 as the user-defined identifier value of layer 2 in the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setLayerID(grobj, 2, 'TM_Band_2'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setLayerOrdinate(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
ordinate IN NUMBER);
Description
Sets the band ordinate value for a specified layer in a GeoRaster object, or deletes the existing value if you specify a null ordinate parameter.
Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
Band ordinate value of the layer along the band dimension.
Usage Notes
The band ordinate of the layer refers to the physical band that a layer (layerNumber parameter value) is associated with. For the current release, the associations must be as shown in Figure 1-4 in Section 1.5: layer 1 is band 0, layer 2 is band 1, and so on.
The band ordinate for the object layer is ignored by GeoRaster.
The GeoRaster object is automatically validated after the operation completes.
To return the band ordinate value for a layer, use the SDO_GEOR.getLayerOrdinate function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, if ordinate is null, or if ordinate does not equal layerNumber-1 when layerNumber does not specify the object layer.
Examples
The following example sets the band ordinate value for layer 1 to be 0 (zero) in the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setLayerOrdinate(grobj, 1, 0); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setModelSRID(
georaster IN OUT SDO_GEORASTER,
srid IN NUMBER);
Description
Sets the coordinate system (SDO_SRID value) for the model (ground) space for a GeoRaster object, or deletes the existing value if you specify a null srid parameter.
Parameters
GeoRaster object.
Coordinate system. Must be a value from the SRID column of the MDSYS.CS_SRS table if the GeoRaster metadata contains spatial reference information; or must be null (causing no coordinate system associated with the model space) if the GeoRaster metadata does not contain spatial reference information.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
If the original GeoRaster object had a different model space SRID value, this procedure does not change the raster data itself. In other words, this procedure does not cause any reprojection or resampling on the cell data of the GeoRaster object.
To return the coordinate system (SDO_SRID value) associated with the model space for a GeoRaster object, use the SDO_GEOR.getModelSRID function.
Examples
The following example changes the coordinate system for a GeoRaster object to Longitude / Latitude (WGS 66), which is the coordinate system associated with SRID value 82394 in the MDSYS.CS_SRS system table. (The example refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setModelSRID(grobj, 82394); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setOrthoRectified(
georaster IN OUT SDO_GEORASTER,
isOrthoRectified IN VARCHAR2);
Description
Specifies whether or not a GeoRaster object is orthorectified, or deletes the existing value if you specify a null isOrthoRectified parameter.
Parameters
GeoRaster object.
Specify TRUE to specify that the GeoRaster object is orthorectified, FALSE to specify that the GeoRaster object is not orthorectified, or null if the GeoRaster metadata does not contain spatial reference information. Must be TRUE or FALSE (case-insensitive) if the GeoRaster metadata contains spatial reference information.
Usage Notes
This procedure modifies the GeoRaster metadata for the object. It does not actually orthorectify the object. Users are responsible for ensuring that orthorectification is performed.
The GeoRaster object is automatically validated after the operation completes.
To be set as orthorectified, a GeoRaster object must be spatially referenced and rectified.
Examples
The following example identifies the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table as orthorectified. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setOrthoRectified(grobj, 'TRUE'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setRasterType(
georaster IN OUT SDO_GEORASTER,
rasterType IN NUMBER);
Description
Sets the raster type of a GeoRaster object.
Parameters
GeoRaster object.
Numeric value to be set as the rasterType attribute of the GeoRaster object. Must be a valid 5-digit numeric value, in the format described in Section 2.1.1.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
An exception is raised if rasterType is null or if the first three digits of the existing rasterType value are changed.
Examples
The following example sets the rasterType attribute value of a GeoRaster object to 20001. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=2 FOR UPDATE; sdo_geor.setRasterType(grobj, 20001); UPDATE georaster_table SET georaster = grobj WHERE georid=2; COMMIT; END; /
Format
SDO_GEOR.setRectified(
georaster IN OUT SDO_GEORASTER,
isRectified IN VARCHAR2);
Description
Specifies whether or not a GeoRaster object is rectified, or deletes the existing value if you specify a null isRectified parameter.
Parameters
GeoRaster object.
Specify TRUE to specify that the GeoRaster object is rectified, FALSE to specify that the GeoRaster object is not rectified, or null if the GeoRaster metadata does not contain spatial reference information. Must be TRUE or FALSE (case-insensitive) if the GeoRaster metadata contains spatial reference information.
Usage Notes
This procedure modifies the GeoRaster metadata for the object. It does not actually rectify the object. Users are responsible for ensuring that rectification is performed.
The GeoRaster object is automatically validated after the operation completes.
A GeoRaster object must be spatially referenced if you want to set isRectified to TRUE (see the SDO_GEOR.setSpatialReferenced procedure).
Examples
The following example identifies the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table as not rectified. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setRectified(grobj, 'false'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setScaling(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
scalingFunc IN SDO_NUMBER_ARRAY);
Description
Sets the scaling function associated with a layer, or deletes the existing value if you specify a null scalingFunc parameter.
Note:
GeoRaster does not perform operations using the scaling function in the current release.Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
An array of numeric values, with one value for each coefficient in the scaling function. The scaling function is as follows:
value = (a0 + a1 * cellvalue) / (b0 + b1 * cellvalue)
The order of the coefficients is: a0, a1, b0, b1.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
An exception is raised if layerNumber is null or invalid for the GeoRaster object; if scalingFunc is of the wrong array size; if one of a0, a1, b0, and b1 is null; or if both b0 and b1 are 0 (zero).
Examples
The following example sets the coefficients of the scaling function for layer 2 of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setScaling(grobj, 2, sdo_number_array(1, 0.5, 1, 0)); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setSpatialReferenced(
georaster IN OUT SDO_GEORASTER,
isReferenced IN VARCHAR2);
Description
Specifies whether or not a GeoRaster object is spatially referenced, or deletes the existing value if you specify a null isReferenced parameter.
Parameters
GeoRaster object.
Specify TRUE to specify that the GeoRaster object is spatially referenced, FALSE to specify that the GeoRaster object is not spatially referenced, or null if the GeoRaster metadata does not contain spatial reference information. Must be TRUE or FALSE (case-insensitive) if the GeoRaster metadata contains spatial reference information.
Usage Notes
This procedure sets the GeoRaster object to be spatially referenced or not spatially referenced.
The GeoRaster object is automatically validated after the operation completes.
Examples
The following example sets the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table as not spatially referenced. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setSpatialReferenced(grobj, 'FALSE'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setSpatialResolutions(
georaster IN OUT SDO_GEORASTER,
resolutions IN SDO_NUMBER_ARRAY);
Description
Sets the spatial resolution value along each spatial dimension of a GeoRaster object, or deletes the existing values if you specify a null resolutions parameter.
Parameters
GeoRaster object.
An array of numeric values, one for each spatial dimension. Each value indicates the number of units of measurement associated with the data area represented by that spatial dimension of a pixel. For example, if the spatial resolution values are (10,10) and the unit of measurement for the ground data is meters, each pixel represents an area of 10 meters by 10 meters.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
If resolutions is not null and if the GeoRaster metadata currently does not contain spatial reference information, this procedure adds spatial reference information with minimum default values.
See also the Usage Notes for the SDO_GEOR.getSpatialResolutions function.
Examples
The following example sets the spatial resolution values along the column and row (X and Y) dimensions of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setSpatialResolutions(grobj, sdo_number_array(28.5,28.5)); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setSpectralResolution(
georaster IN OUT SDO_GEORASTER,
resolution IN NUMBER);
Description
Sets the spectral resolution of a GeoRaster object if it is a hyperspectral or multiband image, or deletes the existing value if you specify a null resolution parameter.
Parameters
GeoRaster object.
Spectral resolution value. Must be null if the GeoRaster metadata does not contain band reference information.
Usage Notes
Taken together, the spectral unit and spectral resolution identify the wavelength interval for a band. For example, if the spectral resolution value is 2 and the spectral unit value is MILLIMETER, the wavelength interval for a band is 2 millimeters.
The GeoRaster object is automatically validated after the operation completes.
To return the spectral resolution for a GeoRaster object, use the SDO_GEOR.getSpectralResolution function.
Examples
The following example sets 0.5 as the spectral resolution value for the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setSpectralResolution(grobj, 0.5); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setSpectralUnit(
georaster IN OUT SDO_GEORASTER,
unit IN VARCHAR2);
Description
Sets the unit of measurement for identifying the wavelength interval for a band, or deletes the existing value if you specify a null unit parameter.
Parameters
GeoRaster object.
Spectral unit. Must be one of the following values if the GeoRaster metadata contains band reference information: METER, MILLIMETER, MICROMETER, NANOMETER. Must be null if the GeoRaster metadata does not contain band reference information.
Usage Notes
Taken together, the spectral unit and spectral resolution identify the wavelength interval for a band. For example, if the spectral resolution value is 2 and the spectral unit value is MILLIMETER, the wavelength interval for a band is 2 millimeters.
The GeoRaster object is automatically validated after the operation completes.
To return the spectral unit for a GeoRaster object, use the SDO_GEOR.getSpectralUnit function.
Examples
The following example sets MICROMETER as the spectral unit for the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setSpectralUnit(grobj, 'micrometer'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setSRS(
georaster IN OUT SDO_GEORASTER,
srs IN SDO_GEOR_SRS);
Description
Sets the spatial reference information of a GeoRaster object, or deletes the existing information if you specify a null srs parameter.
Parameters
GeoRaster object.
An object of type SDO_GEOR_SRS, which is described in Section 2.3.5.
In this object, isReferenced, isRectified, and isOrthoRectified must be TRUE or FALSE (case-insensitive); spatialResolution must be an array of the correct size; the spatial tolerance cannot be negative; CoordLocation must be 0 or 1; and the polynomial parameters cannot be null.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
To return the SDO_GEOR_SRS information for a GeoRaster object, use the SDO_GEOR.getSRS function.
Examples
The following example specifies changes to several spatial reference attributes of a GeoRaster object, calls the setSRS procedure to update the spatial reference information, and then updates the GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; srs sdo_geor_srs; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4; srs := sdo_geor.getSRS(grobj); srs.isReferenced := 'TRUE'; srs.isRectified := 'TRUE'; srs.isOrthoRectified := null; srs.srid := 82262; srs.spatialResolution := sdo_number_array(28.5, 28.5); srs.rowOff := 0; srs.columnOff := 0; srs.xOff := 0; srs.yOff := 0; srs.zOff := 0; srs.rowScale := 1; srs.columnScale := 1; srs.xScale := 1; srs.yScale := 1; srs.zScale := 1; srs.rowNumerator := SDO_NUMBER_ARRAY(1, 2, 1, 3, 32631.5614, 0, -.03508772); srs.rowDenominator := SDO_NUMBER_ARRAY(1, 0, 0, 1, 1); srs.columnNumerator := SDO_NUMBER_ARRAY(1, 2, 1, 3, -7894.7544, .035087719, 0); srs.columnDenominator := SDO_NUMBER_ARRAY(1, 0, 0, 1, 1); sdo_geor.setSRS(grobj, srs); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END;/
Format
SDO_GEOR.setStatistics(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
statistics IN SDO_NUMBER_ARRAY);
Description
Sets statistical data associated with a layer.
Parameters
GeoRaster object.
Number of the layer for which to set the statistics. A value of 0 (zero) indicates the object layer.
An array with the following numeric values: MIN, MAX, MEAN, MEDIAN, MODEVALUE, STD. You must specify non-null values for all values in the array.
If this parameter is null, all statistical information associated with the layer is deleted.
Usage Notes
This procedure sets statistical data described by the <statisticDatasetType> element in the GeoRaster metadata XML schema, which is described in Appendix A.
To retrieve the statistical data associated with a layer, use the SDO_GEOR.getStatistics function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if statistics is of the wrong array size or has any null array elements.
Examples
The following example sets the statistical data for layer 0 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setStatistics(grobj, 0, SDO_NUMBER_ARRAY(0, 255, 100, 127, 95, 25)); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setULTCoordinate(
georaster IN OUT SDO_GEORASTER,
ultCoord IN SDO_NUMBER_ARRAY);
Description
Sets the cell coordinate values of the upper-left corner of a GeoRaster object, or deletes the existing values if you specify a null ultCoord parameter.
Parameters
GeoRaster object.
An array of two numbers (row and column ordinates) or three numbers (row, column, and band ordinates).
Usage Notes
If the metadata contains spatial reference information and the GeoRaster object is georeferenced, the spatial reference information is checked for validity. If it is valid, the spatial reference information including the georeferencing information is updated and adjusted according to the new ULT coordinates; otherwise, an exception is raised.
To return the upper-left coordinate values for a GeoRaster object, use the SDO_GEOR.getULTCoordinate function.
An exception is raised if ultCoord is null or of the wrong array size or has any null array elements.
Examples
The following example sets the row and column ordinates of the upper-left corner of a GeoRaster object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=1 FOR UPDATE; sdo_geor.setULTCoordinate(grobj, sdo_number_array(100, 100)); UPDATE georaster_table SET georaster = grobj WHERE georid=1; COMMIT; END; /
Format
SDO_GEOR.setVAT(
georaster IN OUT SDO_GEORASTER,
layerNumber IN NUMBER,
vatName IN VARCHAR2);
Description
Sets the name of the value attribute table (VAT) associated with a layer of a GeoRaster object, or deletes the existing value if you specify a null vatName parameter.
Parameters
GeoRaster object.
Number of the layer for which to perform the operation.
Name of the value attribute table.
Usage Notes
The GeoRaster object is automatically validated after the operation completes.
For more information about value attribute tables, see Section 1.2.3.
To return the name of the value attribute table associated with a layer of a GeoRaster object, use the SDO_GEOR.getVAT function.
An exception is raised if layerNumber is null or invalid for the GeoRaster object, or if vatName is an empty string ('').
Examples
The following example specifies VATT1 as the value attribute table to be associated with layer 3 of the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setVAT(grobj, 3, 'VATT1'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.setVersion(
georaster IN OUT SDO_GEORASTER,
majorVersion IN VARCHAR2,
minorVersion IN VARCHAR2);
Description
Sets the user-specified version of a GeoRaster object.
Parameters
GeoRaster object.
String representing the major version of the GeoRaster object. For example, if the complete version string is 15a.beta1, specify the majorVersion value as 15a.
If the parameter value is null, any existing majorVersion value in the GeoRaster object is deleted.
String representing the minor version of the GeoRaster object. For example, if the complete version string is 15a.beta1, specify the minorVersion value as beta1.
If the parameter value is null, any existing minorVersion value in the GeoRaster object is deleted.
Usage Notes
The major and minor version strings can reflect any versioning scheme that you choose. The majorVersion and minorVersion values can be any string, except that neither can be an empty string (that is, neither can be '').
To retrieve the version string for a GeoRaster object, use the SDO_GEOR.getVersion function, which returns the version in the format major-version.minor-version.
Examples
The following example sets 15a.beta1 as the version for the GeoRaster object (GEORASTER column) in the row with the GEORID column value of 4 in the GEORASTER_TABLE table. (The GEORASTER_TABLE table definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE grobj sdo_georaster; BEGIN SELECT georaster INTO grobj FROM georaster_table WHERE georid=4 FOR UPDATE; sdo_geor.setVersion(grobj, '15a', 'beta1'); UPDATE georaster_table SET georaster = grobj WHERE georid=4; COMMIT; END; /
Format
SDO_GEOR.subset(
inGeoraster IN SDO_GEORASTER,
cropArea IN SDO_GEOMETRY,
layerNumbers IN VARCHAR2,
storageParam IN VARCHAR2,
outGeoraster IN OUT SDO_GEORASTER);
or
SDO_GEOR.subset(
inGeoraster IN SDO_GEORASTER,
cropArea IN SDO_NUMBER_ARRAY,
bandNumbers IN VARCHAR2,
storageParam IN VARCHAR2,
outGeoraster IN OUT SDO_GEORASTER);
Description
Performs either or both of the following operations: (1) spatial crop, cut, or clip, or (2) layer or band subset or duplicate.
Parameters
The SDO_GEORASTER object on which the operation or operations are to be performed.
Crop area definition. If the data type is SDO_NUMBER_ARRAY, the parameter identifies the upper-left (row, column) and lower-right (row, column) coordinates of a rectangular window, and raster space is assumed. If the data type is SDO_GEOMETRY, the minimum bounding rectangle (MBR) of the geometry object is used as the crop area; see also the Usage Notes for SDO_SRID requirements.
If cropArea is of type SDO_GEOMETRY, use the layerNumbers parameter to specify one or more layer numbers; if cropArea is of type SDO_NUMBER_ARRAY, use the bandNumbers parameter to specify one or more band numbers.
A string identifying the logical layer numbers on which the operation or operations are to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 2-4 for layers 2, 3, and 4).
A string identifying the physical band numbers on which the operation or operations are to be performed. Use commas to delimit the values, and a hyphen to indicate a range (for example, 1-3 for bands 1, 2, and 3).
A string specifying storage parameters, as explained in Section 1.4.1.
The new SDO_GEORASTER object.
Usage Notes
This procedure has a variety of possible uses. For example, you can call it to crop a small area or obtain a subset of a few layers of a GeoRaster object, you can duplicate layers, and you can specify storage parameters such as blocking and interleaving for the resulting object.
If the cropArea parameter data type is SDO_GEOMETRY, the SDO_SRID value must be one of the following:
Null, to specify raster space
A value from the SRID column of the MDSYS.CS_SRS table
If the SDO_SRID values for the cropArea parameter geometry and the model space are different, the window parameter geometry is automatically transformed to the coordinate system of the model space before the operation is performed. (Raster space and model space are explained in Section 1.3.)
Any pyramid data in the input GeoRaster object is not copied to the output GeoRaster object.
An exception is raised if one or more of the following are true:
inGeoraster is invalid.
outGeoraster has not been initialized.
A raster data table for outGeoraster does not exist and outGeoraster is not a blank GeoRaster object.
Examples
The following example creates a GeoRaster object that contains only specified bands from a specified window from the original object. (It refers to a table named GEORASTER_TABLE, whose definition is presented after Example 1-1 in Section 1.4.1.)
DECLARE
gr1 sdo_georaster;
gr2 sdo_georaster;
BEGIN
INSERT INTO georaster_table (georid, georaster)
VALUES (41, sdo_geor.init('RDT_1'))
RETURNING georaster INTO gr2;
SELECT georaster INTO gr1 FROM georaster_table WHERE georid=4;
sdo_geor.subset(gr1, sdo_geometry(2003, NULL, NULL,
sdo_elem_info_array(1, 1003, 3),
sdo_ordinate_array(0,256,255,511)),
'3,1-2', null, gr2);
UPDATE georaster_table SET georaster=gr2 WHERE georid=41;
COMMIT;
END;
/
Format
SDO_GEOR.validateGeoraster(
georaster IN SDO_GEORASTER
) RETURN VARCHAR2;
Description
Validates a GeoRaster object, checking its raster data and metadata.
Parameters
GeoRaster object to be checked for validity.
Usage Notes
This function returns TRUE if the GeoRaster object is valid, NULL if the GeoRaster object is null, an Oracle error code if the error is known, or FALSE for an unknown error.You should use this function after you create, load, or modify a GeoRaster object, to ensure that it is valid before you process it further.
If this function identifies a GeoRaster object as invalid with an error code of 13454, the object's metadata is not valid according to the GeoRaster XML schema. If this happens, call the SDO_GEOR.schemaValidate function to find specific locations and other information about the errors.
This function not only validates GeoRaster metadata against the GeoRaster XML schema, but it also enforces restrictions and requirements in the current release that are not described in the XML schema. The following are some of the restrictions and requirements enforced by this function:
Layer numbers must be from 1 to n where n is the total number of layers.
The cellRepresentationType value must be UNDEFINED.
If totalBandBlocks or bandBlockSize is specified in the metadata, both must be specified. If there is only one band, no band blocking is allowed.
The total number of blocks times the blocking size along a dimension must match the dimension size plus padding size, and the size of each cell data BLOB object must match the metadata description in terms of blocking or nonblocking.
The size and number of GeoRaster data blocks stored in the raster data table must be consistent with the metadata description. For cell data, the number and size of the blocks are checked; the content of the blocks is not checked.
The only pyramid types supported are NONE (no pyramids) and DECREASE. (For more information about pyramids, see Section 1.7.)
For an uncompressed GeoRaster object, the size of the BLOB object in each raster block is checked based on the blocking size and cell depth. However, for a compressed GeoRaster object, the size of the BLOB object in each raster block is not checked. Thus, when a compressed GeoRaster object is decompressed, the data might not be valid with respect to size.
Only one type of polynomial model is supported, as described in Section 1.6.1. The offsets, scales, and RMS values for the supported polynomial model are fixed. The pType, nVars, and number of coefficients are fixed for each polynomial, except for the values of the coefficients a, b, c, d, e, and f. The fixed values are described in Table 2-4 in Section 2.3.5. The SDO_GEOR_SRS data type is a precise map of the GeoRaster SRS polynomial model in the XML metadata document.
The RigorousModel and StoredFunction georeferencing models are not supported, although you can store GCP (ground control point) data in an Oracle table and register the table name in the GeoRaster SRS metadata.
Spatial resolutions can be inconsistent with the affine transformation scales if the GeoRaster object is georeferenced.
GeoRaster temporal referencing and band referencing are not supported, although in the temporal reference system (TRS) and band reference system (BRS) you can store the beginning and ending date and time, the spectral resolution, the spectral unit, and related descriptive information.
Only one layerInfo element is supported. A layer can be defined only along one dimension, and this dimension must be BAND. However, within the layerInfo element, the number of subLayer elements is limited only by the total number of layers. The layer number for the objectLayer elements is 0, and the layer numbers for subLayer elements are 1 to n where n is the total number of layers.
The scaling function, BIN function, and statistical data or histogram can be stored in the GeoRaster metadata and must be valid against the XML schema, but the value ranges for these items are not restricted. GeoRaster interfaces that use this metadata are limited. Applications should validate this optional metadata before using it.
The numbers of colormap values and grayscale mapping values are not restricted, but there must be no duplicate colormap or grayscale values, and the values in each array must be consistent with the cellDepth value of the GeoRaster object and must be in ascending order. The value range of the red, green, blue, alpha, and gray components must be integers from 0 to 255.
This function does not check any external tables (such as a GCP table, bin table, histogram table, grayscale table, or colormap table) whose names are registered in the XML metadata.
This function does not validate the spatial extent geometry, or whether or not the spatial relationship between the geometry and the raster data is correct. To validate the spatial extent geometry, use the SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT or SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT procedure, which are documented in Oracle Spatial User's Guide and Reference.
This function does not validate the geometry specified in the blockMBR attribute in raster data tables, or whether or not the geometry precisely encloses the raster blocks. (The blockMBR attribute is described in Section 2.2.6.) To validate this geometry, use the SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT or SDO_GEOM.VALIDATE_LAYER_WITH_CONTEXT procedure, which are documented in Oracle Spatial User's Guide and Reference.
If there is no entry for the GeoRaster object in the ALL_SDO_GEOR_SYSDATA view (described in Section 2.4), this procedure returns an error stating that the GeoRaster object is not registered. To prevent this error, be sure that the GeoRaster object is inserted into a GeoRaster table and that this table has the required GeoRaster DML trigger created on it. To enable cross-schema access, you must also ensure that users calling this procedure have an appropriate privilege on both the GeoRaster table and the associated raster data table.
Examples
The following example validates the GeoRaster objects in a table.
SELECT t.georid,
sdo_geor.validategeoraster(t.georaster) isvalid
from georaster_table t order by georid;
GEORID ISVALID
---------- ----------
3 TRUE
4 TRUE
