ST_TRANSFORM

Introduced or updated: v1.2.606

Converts a GEOMETRY object from one spatial reference system (SRS) to another. If you just need to change the SRID without changing the coordinates (e.g. if the SRID was incorrect), use ST_SETSRID instead.

Syntax

ST_TRANSFORM(<geometry> [, <from_srid>], <to_srid>)

Arguments

Arguments	Description
<geometry>	The argument must be an expression of type GEOMETRY object.
<from_srid>	Optional SRID identifying the current SRS of the input GEOMETRY object, if this argument is omitted, use the SRID specified in the input GEOMETRY object.
<to_srid>	The SRID that identifies the SRS to use, transforms the input GEOMETRY object to a new object that uses this SRS.

Return Type

Geometry.

Examples

SET GEOMETRY_OUTPUT_FORMAT = 'EWKT'

SELECT ST_TRANSFORM(ST_GEOMFROMWKT('POINT(389866.35 5819003.03)', 32633), 3857) AS transformed_geom

┌───────────────────────────────────────────────┐
│                transformed_geom               │
├───────────────────────────────────────────────┤
│ SRID=3857;POINT(1489140.093766 6892872.19868) │
└───────────────────────────────────────────────┘

SELECT ST_TRANSFORM(ST_GEOMFROMWKT('POINT(4.500212 52.161170)'), 4326, 28992) AS transformed_geom

┌──────────────────────────────────────────────┐
│               transformed_geom               │
├──────────────────────────────────────────────┤
│ SRID=28992;POINT(94308.670475 464038.168827) │
└──────────────────────────────────────────────┘