ST_Translate

Signatures

GEOMETRY ST_Translate(GEOMETRY geom, DOUBLE x, DOUBLE y);
GEOMETRY ST_Translate(GEOMETRY geom, DOUBLE x, DOUBLE y, DOUBLE z);

Description

Translates geom by the vector (x, y) or (x, y, z).

Warning

Cannot translate geometries of mixed dimension.

LINESTRING(0 0, 1 0 0) cannot be translated because its second coordinate has a z-value while its first coordinate does not.

Examples

SELECT ST_Translate('POLYGON((0 0, 3 0, 3 5, 0 5, 0 0))', 2, 1);
-- Answer: POLYGON((2 1, 5 1, 5 6, 2 6, 2 1))

SELECT ST_Translate('LINESTRING(-71.01 42.37, -71.11 42.38)', 1, 0.5);
-- Answer: LINESTRING(-70.01 42.87, -70.11 42.88)

SELECT ST_Translate('POINT(1 2 3)', 10, 20, 30);
-- Answer: POINT(11 22 33)

SELECT ST_Translate('MULTIPOINT((0 1), (2 2), (1 3))', 1, 0);
-- Answer: MULTIPOINT((1 1), (3 2), (2 3))

SELECT ST_Translate('GEOMETRYCOLLECTION(
                        POLYGON((0 0, 3 5, 6  6, 0 7, 0 0)),
                        MULTIPOINT((0 1), (2 2), (1 3)))', -1, 1);
-- Answer: GEOMETRYCOLLECTION(POLYGON((-1 1, 2 6, 5 7, -1 8, -1 1)),
--                            MULTIPOINT((-1 2), (1 3), (0 4)))

Doing a 3D translation on a 2D Geometry is the same as doing a 2D translation:

SELECT ST_Translate('LINESTRING(0 0, 1 0)', 1, 2, 3);
-- Answer: LINESTRING(1 2, 2 2)

Doing a 2D translation on a 3D Geometry leaves z-values unchanged:

SELECT ST_Translate('LINESTRING Z(0 0 0, 1 0 0)', 1, 2);
-- Answer: LINESTRING Z(1 2 0, 2 2 0)

Non-examples

SELECT ST_Translate(NULL, 1, 2),
-- Answer: NULL

SELECT ST_Translate(NULL, 1, 2, 3);
-- Answer: NULL

SELECT ST_Translate('LINESTRING(0 0, 1 0 0)', 1, 2);
-- ERROR: Cannot translate geometries of mixed dimension

SELECT ST_Translate('LINESTRING(0 0, 1 0 0)', 1, 2, 3);
-- ERROR: Cannot translate geometries of mixed dimension

See also

• ST_Rotate

• Source code