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CROSSES

Synonym for ST_CROSSES. Checks if two geometries cross, meaning they share some interior points but not all, and the intersection has a lower dimension.

Syntax

Crosses(g1,g2)

Description

Returns 1 if g1 spatially crosses g2. Returns NULL if g1 is a or a , or if g2 is a or a . 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 uses object shapes.

This page is licensed: GPLv2, originally from

Polygon
MultiPolygon
Point
MultiPoint
ST_CROSSES()
fill_help_tables.sql