SDO_GEOR.getStatistics

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

GeoRaster object.

layerNumber

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 GeoRaster Metadata XML Schema. 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: Using storageParam Keywords in Storage Parameters.)

SELECT sdo_geor.getStatistics(georaster, 1) layer1
FROM georaster_table WHERE georid=4;

LAYER1
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SDO_NUMBER_ARRAY(0, 255, 100, 127, 95, 25)