MBROverlaps
Syntax
MBROverlaps(g1,g2)
Description
Returns 1 or 0 to indicate whether the Minimum Bounding Rectangles of the two geometries g1
and g2
overlap. The term spatially overlaps is used if two geometries intersect and their intersection results in a geometry of the same dimension but not equal to either of the given geometries.
Examples
SET @g1 = GeomFromText('Polygon((0 0,0 3,3 3,3 0,0 0))'); SET @g2 = GeomFromText('Polygon((4 4,4 7,7 7,7 4,4 4))'); SELECT mbroverlaps(@g1,@g2); +----------------------+ | mbroverlaps(@g1,@g2) | +----------------------+ | 0 | +----------------------+ SET @g1 = GeomFromText('Polygon((0 0,0 3,3 3,3 0,0 0))'); SET @g2 = GeomFromText('Polygon((3 3,3 6,6 6,6 3,3 3))'); SELECT mbroverlaps(@g1,@g2); +----------------------+ | mbroverlaps(@g1,@g2) | +----------------------+ | 0 | +----------------------+ SET @g1 = GeomFromText('Polygon((0 0,0 4,4 4,4 0,0 0))'); SET @g2 = GeomFromText('Polygon((3 3,3 6,6 6,6 3,3 3))'); SELECT mbroverlaps(@g1,@g2); +----------------------+ | mbroverlaps(@g1,@g2) | +----------------------+ | 1 | +----------------------+
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