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STIsClosed (geography Data Type)

Returns 1 if the start and end points of the given geography instance are the same. Returns 1 for geography collection types if each contained geography instance is closed. Returns 0 if the instance is not closed.

This geography data type method supports FullGlobe instances or spatial instances that are larger than a hemisphere.

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.

.STIsClosed ( )

SQL Server return type: bit

CLR return type: SqlBoolean

This method returns 0 if any figures of a geography instance are points, or if the instance is empty.

This method returns true if a FullGlobe instance is a Polygon or other type of instance.

All Polygon instances are considered closed.

The following example creates a Polygon instance and uses STIsClosed() to test if the Polygon is closed.

DECLARE @g geography;
SET @g = geography::STGeomFromText('POLYGON((-122.358 47.653, -122.348 47.649, -122.348 47.658, -122.358 47.658, -122.358 47.653))', 4326);
SELECT @g.STIsClosed();
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