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STRelate (geometry Data Type)

Returns 1 if a geometry instance is related to another geometry instance, where the relationship is defined by a Dimensionally Extended 9 Intersection Model (DE-9IM) pattern matrix value; otherwise, returns 0.

.STRelate ( other_geometry, intersection_pattern_matrix )

other_geometry

Is another geometry instance to compare against the instance on which STRelate() is invoked.

intersection_pattern_matrix

Is a string of type nchar(9) encoding acceptable values for the DE-9IM pattern matrix device between the two geometry instances.

This method always returns null if the spatial reference IDs (SRIDs) of the geometry instances do not match. This method will throw an ArgumentException if the matrix is not well-formed.

SQL Server return type: bit

CLR return type: SqlBoolean

The following example uses STRelate() to test two geometry instances for spatial disjoint using an explicit DE-9IM pattern.

DECLARE @g geometry;
DECLARE @h geometry;
SET @g = geometry::STGeomFromText('LINESTRING(0 2, 2 0, 4 2)', 0);
SET @h = geometry::STGeomFromText('POINT(5 5)', 0);
SELECT @g.STRelate(@h, 'FF*FF****');
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