ST_ASEWKB

Converts shapes of the GEOGRAPHY data type to the extended Well-Known Binary (EWKB) format using Spatial Reference Identifier (SRID) 4326, which corresponds to the WGS84 coordinate system.

Syntax

ST_ASEWKB(<object>)

Parameters

Parameter	Description	Supported input types
<object>	The GEOGRAPHY object to convert to EWKB format.	GEOGRAPHY

Return Type

ST_ASEWKB returns a value of type BYTEA.

Example

The following code example creates a GEOGRAPHY object from the WKT representation of a Point at specified longitude and latitude coordinates and converts it to EWKB format:

SELECT ST_ASEWKB(ST_GEOGFROMTEXT('POINT(-73.98551041593687 40.75793403395676)')) AS result

Returns

result (BYTEA)
‘\x0101000020e61000003d94479a127f52c0502f80fb03614440’