This topic describes the ST_GeomFromWKB function. This function constructs a geometry object by using a Well-Known Binary (WKB) string and optionally a spatial reference identifier (SRID).

Syntax

geometry  ST_GeomFromWKB(bytea  geom);
geometry  ST_GeomFromWKB(bytea  geom , integer  srid);

Parameters

Parameter Description
geom The WKB string that you want to specify.
srid The spatial reference identifier (SRID) of the geometry object.

Description

  • If you do not specify an SRID, the default SRID 0 is used.
  • This function supports circular strings and curves.

Examples

SELECT ST_AsText(ST_GeomFromWKB(E'\\x01010000000000000000005d400000000000004440'));
   st_astext
---------------
 POINT(116 40)
(1 row)