PostGIS
Synopsis
geometry +`*`+ST_LinestringFromWKB*(`bytea `WKB`)`;
geometry +`*`+ST_LinestringFromWKB*(`bytea `WKB, integer
srid`)`;
Description
The ST_LinestringFromWKB function, takes a well-known binary
representation of geometry and a Spatial Reference System ID (SRID)
and creates an instance of the appropriate geometry type - in this case,
a LINESTRING geometry. This function plays the role of the Geometry
Factory in SQL.
If an SRID is not specified, it defaults to 0. NULL is returned if
the input bytea does not represent a LINESTRING geometry. This
an alias for ST_LineFromWKB.
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This method
implements the OGC Simple
Features Implementation Specification for SQL 1.1. s3.2.6.2
This method
implements the SQL/MM specification. SQL-MM 3: 7.2.9
Examples
SELECT
ST_LineStringFromWKB(
ST_AsBinary(ST_GeomFromText('LINESTRING(1 2, 3 4)'))
) AS aline,
ST_LinestringFromWKB(
ST_AsBinary(ST_GeomFromText('POINT(1 2)'))
) IS NULL AS null_return;
aline | null_return
------------------------------------------------
010200000002000000000000000000F ... | t