ST_LineFromMultiPoint

ST_LineFromMultiPoint returns a linestring from an input multipoint geometry. The order of the points is preserved. The spatial reference system identifier (SRID) of the returned geometry is the same as that of the input geometry. The dimension of the returned geometry is the same as that of the input geometry.

Syntax

ST_LineFromMultiPoint(geom)

Arguments

geom

A value of data type GEOMETRY or an expression that evaluates to a GEOMETRY type. The subtype must be MULTIPOINT.

Return type

GEOMETRY

If geom is null, then null is returned.

If geom is empty, then an empty LINESTRING is returned.

If geom contains empty points, then these empty points are ignored.

If geom isn't a MULTIPOINT, then error is returned.

Examples

The following SQL creates a linestring from a multipoint.

SELECT ST_AsEWKT(ST_LineFromMultiPoint(ST_GeomFromText('MULTIPOINT(0 0,10 0,10 10,5 5,0 5)',4326)));

 st_asewkt
---------------------------------------------
 SRID=4326;LINESTRING(0 0,10 0,10 10,5 5,0 5)