STGeometryType (geography Data Type)
Returns the Open Geospatial Consortium (OGC) type name represented by a geography instance.
Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database.
The following example creates a Polygon instance and uses STGeometryType() to confirm that it is a polygon.
DECLARE @g geometry; SET @g = geometry::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.STGeometryType();