*(mysql.info.gz)* Spatial operators

Info Catalog
*(mysql.info.gz)* **Functions that produce new geometries**
*(mysql.info.gz)* **Functions that create new geometries from existing ones**
18.5.3.2 Spatial Operators
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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.

Info Catalog
*(mysql.info.gz)* **Functions that produce new geometries**
*(mysql.info.gz)* **Functions that create new geometries from existing ones**

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