There is a similar problem with the intersection algorithm, which I filed here:






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From: Geometry [] On Behalf Of Volker Schöch
Sent: Mittwoch, 3. April 2013 18:31
To: Boost.Geometry library mailing list (
Subject: [geometry] New tickets for old issues: difference/sym_difference and multi-polygons



Not sure if this belongs on the mailing list at all, but I filed a couple of Trac tickets today for old issues (1.48) that are still present in 1.52.


sym_difference of non-closed polygons returns closed polygon


difference of non-closed polygons returns closed polygon


sym_difference yields bad result for large numbers