ST_GeogFromWKB

ST_GeogFromWKB constructs a geography object from a hexadecimal well-known binary (WKB) representation of an input geography.

Syntax

ST_GeogFromWKB(wkb_string)

Arguments

wkb_string

A value of data type VARCHAR that is a hexadecimal WKB representation of a geography.

Return type

GEOGRAPHY

If the SRID value is provided it is set to the provided value. If SRID is not provided, it is set to 4326.

If wkb_string is null, then null is returned.

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

Examples

The following SQL constructs a geography from a hexadecimal WKB value.

SELECT ST_AsEWKT(ST_GeogFromWKB('01030000000100000005000000000000000000000000000000000000000000000000000000000000000000F03F000000000000F03F000000000000F03F000000000000F03F000000000000000000000000000000000000000000000000'));

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