Returns 1 if g1 spatially crosses g2. Returns NULL if g1 is a Polygon or a MultiPolygon, or if g2 is a Point or a MultiPoint. Otherwise, returns 0.

The term spatially crosses denotes a spatial relation between two given geometries that has the following properties:

  • The two geometries intersect
  • Their intersection results in a geometry that has a dimension that is one less than the maximum dimension of the two given geometries
  • Their intersection is not equal to either of the two given geometries

CROSSES() is based on the original MySQL implementation, and uses object bounding rectangles, while ST_CROSSES() uses object shapes.


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