STConvexHull (geometry)

STConvexHull (geometry)#

Returns an object representing the convex hull of a geometry instance.

Syntax#

.STConvexHull ()

Return type#

geometry

Remarks#

STConvexHull() returns the smallest convex polygon that contains the given geometry instance. Points or co-linear LineString instances will produce an instance of the same type as that of the input.

Example#

Use STConvexHull() to find the convex hull of a non-convex Polygon geometry instance.

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

See Also#