STIsClosed (geometry)#
Returns 1 if the start and end points of the given geometry instance are the same. Returns 1 for geometrycollection types if each contained geometry instance is closed. Returns 0 if the instance is not closed.
Syntax#
.STIsClosed ()
Return type#
bit
Remarks#
This method returns 0 if any figures of a geometry instance are points, or if the instance is empty.
All Polygon instances are considered closed.
Example#
Create a LineString instance and use STIsClosed() to test if the LineString is closed.
DECLARE @g geometry;
SET @g = geometry::STGeomFromText('LINESTRING(0 0, 2 2, 1 0)', 0);
SELECT @g.STIsClosed();