This topic describes the ST_SetSRID function. This function sets a spatial reference identifier (SRID) for a geometry object.

Syntax

geometry  ST_SetSRID(geometry  geom , integer  srid);

Parameters

Parameter Description
geom The geometry object that you want to specify.
srid The SRID of the geometry object.

Description

  • The ST_SetSRID function does not transform the coordinates of the geometry object that you specify. This function sets the metadata that defines the spatial reference system in which the geometry object resides.
    Note If you want to transform the geometry object into a new projection, use the ST_Transform function.
  • The ST_SetSRID function supports circular strings and curves.

Examples

SELECT ST_AsEWKT(ST_SetSRID(ST_GeomFromText('LINESTRING(2 1,1 1)'),4326));
           st_asewkt
-------------------------------
 SRID=4326;LINESTRING(2 1,1 1)
(1 row)