Description

Returns the spatial reference identifier of the raster object as defined in the spatial_ref_sys table.

	From PostGIS 2.0+ the srid of a non-georeferenced raster/geometry is 0 instead of the prior -1.

Examples

SELECT ST_SRID(rast) As srid
FROM dummy_rast WHERE rid=1;

srid
----------------
0
				

See Also

Section 4.1.3.1, “The SPATIAL_REF_SYS Table and Spatial Reference Systems”, ST_SRID