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SQL Anywhere 12.0.1 » SQL Anywhere Server - Spatial Data Support » Using spatial data » Advanced spatial topics


How spatial relationships work

For best performance, you should always use methods like ST_Within, or ST_Touches to test single, specific relationships between geometries. However, if you have more than one relationship to test, ST_Relate can be a better method, since you can test for several relationships at once. ST_Relate is also good when you want to test for a different interpretation of a predicate.

The most common use of ST_Relate is as a predicate, where you specify the exact relationship(s) to test for. However, you can also use ST_Relate to determine all possible relationships between two geometries.

 Predicate use of ST_Relate
 See also
 Non-predicate use of ST_Relate
 See also