Martin, thanks for the info.
Martin Davis wrote: > Yes, that's correct, the geometry relationship predicates are not > available for GeometryCollections. The reason for this is that because > GC's have very loose semantics (e.g. polygons can cross one another > being the main one) it's not possible to robustly & exactly evaluate > some predicates in certain situations. > I guess intersection can always be evaluated correctly, however. With > the new work on prepared geometry, we perhaps could look at widening the > scope a bit. (This might even be supported right now - I can't remember > offhand). Best regards, -- Markus Schneider l a t / l o n GmbH Aennchenstrasse 19 53177 Bonn, Germany phone ++49 +228 18496-0 fax ++49 +228 18496-29 http://www.lat-lon.de http://www.deegree.org ------------------------------------------------------- On June 17 is deegree day - Am 17. Juni ist deegree day http://deegree.org/deegreeday _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
