(mysql.info) spatial-operators

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(mysql.info) functions-that-produce-new-geometries

(mysql.info) functions-that-create-new-geometries-from-existing-ones

 
 16.5.3.2 Spatial Operators
 ..........................
 
 OpenGIS proposes a number of other functions that can produce
 geometries. They are designed to implement spatial operators.
 
 These functions are not implemented in MySQL. They may appear in future
 releases.
 
    * `Buffer(G,D)'
 
      Returns a geometry that represents all points whose distance from
      the geometry value G is less than or equal to a distance of D.
 
    * `ConvexHull(G)'
 
      Returns a geometry that represents the convex hull of the geometry
      value G.
 
    * `Difference(G1,G2)'
 
      Returns a geometry that represents the point set difference of the
      geometry value G1 with G2.
 
    * `Intersection(G1,G2)'
 
      Returns a geometry that represents the point set intersection of
      the geometry values G1 with G2.
 
    * `SymDifference(G1,G2)'
 
      Returns a geometry that represents the point set symmetric
      difference of the geometry value G1 with G2.
 
    * `Union(G1,G2)'
 
      Returns a geometry that represents the point set union of the
      geometry values G1 and G2.
 

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(mysql.info) functions-that-produce-new-geometries

(mysql.info) functions-that-create-new-geometries-from-existing-ones