On Wed, Jul 12, 2006 at 05:23:52PM -0600, Charlie Savage wrote: > Why would the union of the same two geometries be different depending on > whether you use the C API versus the C++ API?
The C-API uses a wrapper for binary operations that tries to handle topology exceptions (usually due to robustness issues). > >The unhappy messages you're seing are in fact very happy ones :) > >It's the new code handling robustness problems by trying different > >reduction or simplification. Your logs seems to reveal that a topology > >preserving simplification with a tolerance of 0.04 did it. > >Seems nice (you should look at results to actually tell if we like it)... > > Sorry, don't understand. Where is this tolerance set in doing a Union? > How do I control it through the C API? There's no way to control that, it's a "try all you can on topology exception" approach. See geos/geom/BinaryOp.h for more info. --strk; _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
