ST_Covers
Name
ST_Covers — Return true if no points of raster rastB lie outside raster rastA.
Synopsis
boolean
ST_Covers
(
raster
rastA
,
integer
nbandA
,
raster
rastB
,
integer
nbandB
)
;
boolean
ST_Covers
(
raster
rastA
,
raster
rastB
)
;
Description
Raster rastA covers rastB if and only if no points of rastB lie in the exterior of rastA. 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.
This function will make use of any indexes that may be available on the rasters. |
To test the spatial relationship of a raster and a geometry, use ST_Polygon on the raster, e.g. ST_Covers(ST_Polygon(raster), geometry) or ST_Covers(geometry, ST_Polygon(raster)). |
Availability: 2.1.0