[geos-devel] TopologyException makes GEOS/JTS very difficult to employ in my production environments...

[G. Allegri]

> As I understood from the other posts, you might have invalid geometries.
> That's my top-priority check. Before and after any operation I check
> that all my geometries are valid, and if not I try to trace back to the
> origin the faulty geometry to correct it.

Well, I checked the original polygons and they were right, but two of
them touch. This seems to make the Multipolygon invalid. Anyway I have
to pass through a collection to do the required difference. It seems
that ST_Union succeds in cleanin the bad intersections...