PostGIS
Name
ST_Overlaps — Return true if raster rastA and rastB intersect but one does not completely contain the other.
Synopsis
+boolean +ST_Overlaps( raster rastA , integer nbandA
, raster rastB , integer nbandB );
+boolean +ST_Overlaps( raster rastA , raster rastB
);
Description
Return true if raster rastA spatially overlaps raster rastB. This means that rastA and rastB intersect but one does not completely contain the other. If the band number is not provided (or set to NULL), only the convex hull of the raster is considered in the test. If the band number is provided, only those pixels with value (not NODATA) are considered in the test.
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Availability: 2.1.0
Examples
-- comparing different bands of same raster
SELECT ST_Overlaps(rast, 1, rast, 2) FROM dummy_rast WHERE rid = 2;
st_overlaps
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