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ST_GeomFromEWKB

PDFRSS

ST_GeomFromEWKB constructs a geometry object from the extended well-known binary (EWKB) representation of an input geometry.

ST_GeomFromEWKB accepts 3DZ, 3DM, and 4D geometries written in WKB and EWKB hexadecimal format.

Syntax

ST_GeomFromEWKB(ewkb_string)

Arguments

ewkb_string

A value of data type VARCHAR that is a hexadecimal EWKB representation of a geometry.

Return type

GEOMETRY

If ewkb_string is null, then null is returned.

If ewkb_string is not valid, then an error is returned.

Examples

The following SQL constructs a polygon from an EWKB value and returns the EWKT representation of a polygon.

SELECT ST_AsEWKT(ST_GeomFromEWKB('0103000020E61000000100000005000000000000000000000000000000000000000000000000000000000000000000F03F000000000000F03F000000000000F03F000000000000F03F000000000000000000000000000000000000000000000000'));

 st_asewkt
--------------------------------
 SRID=4326;POLYGON((0 0,0 1,1 1,1 0,0 0))