STIntersection (geometry Data Type)

Returns an object representing the points where a geometry instance intersects another geometry instance.


.STIntersection (other_geometry)


  • other_geometry
    Is another geometry instance to compare with the instance on which STIntersection() is being invoked, to determine where they intersect.

Return Types

SQL Server return type: geometry

CLR return type: SqlGeometry


STIntersection() always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match.


The following example uses STIntersection() to compute the intersection of two polygons.

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

See Also

Other Resources