STConvexHull (geometry Data Type)

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


.STConvexHull ( )

Return Types

SQL Server return type: geometry

CLR return type: SqlGeometry


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.


The following example uses STConvexHull() to find the convex hull of a non-convex Polygongeometry 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

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