[geos-devel] BUG: relate(g1,g2) crashes with GEOMETRYCOLLECTION?

David Blasby dblasby at refractions.net
Tue Apr 8 16:42:31 EDT 2003

Martin Davis wrote:

>Yep.  Neither GEOS nor JTS support GeometryCollections as arguments to relate.  This is partly because the semantics aren't very well defined, and partly because the obvious semantics [ X.relate(GC) = X.relate(union(GC.components) ] would make the operation non-robust.
>That said, we or you could always implement the above semantics fairly easily...
Its unfortunate that the spec doesnt tell you what to do in the case of 

I've also noticed that overlaps(g,g) is FALSE!


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