ST_Polygon

Introduction: Function to create a polygon built from the given LineString and sets the spatial reference system from the srid

Format: ST_Polygon(geom: Geometry, srid: Integer)

Since: v1.5.0

Example:

SELECT ST_AsText( ST_Polygon(ST_GeomFromEWKT('LINESTRING(75 29 1, 77 29 2, 77 29 3, 75 29 1)'), 4326) );

Output:

POLYGON((75 29 1, 77 29 2, 77 29 3, 75 29 1))