STPointOnSurface (geometry Data Type)

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric

Returns an arbitrary point located within the interior of a geometry instance.


.STPointOnSurface ( )  


To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.

Return Types

SQL Server return type: geometry

CLR return type: SqlGeometry

Open Geospatial Consortium (OGC) type: Point


This method returns null if the instance is empty.


The following example creates a Polygon instance and uses STPointOnSurface() to find a point on the instance.

DECLARE @g geometry;  
SET @g = geometry::STGeomFromText('POLYGON((0 0, 3 0, 3 3, 0 3, 0 0),(2 2, 2 1, 1 1, 1 2, 2 2))', 0);  
SELECT @g.STPointOnSurface().ToString();  

See Also

OGC Methods on Geometry Instances