[OSM-dev] Polygon relationificator - CGAL?

Frederik Ramm frederik at remote.org
Tue Sep 15 00:55:01 BST 2009


Ben Supnik wrote:
> I figure this is as good of a time as any to plug CGAL...it's a hard 
> core open source comp-geom lib:

Great piece of software, but it is worth noting that CGAL has a license 
issue. Parts of it are LGPL (which is ok) but some of the more 
interesting bits are under a fringe license named QPL which tries to be 
even more "free" (as in "forcing users to do all kinds of things they 
would not otherwise do") than the GPL and thus is GPL incompatible.

The arrangement_2 package for example is one bit that comes under QPL 
not LGPL, which means that not only must you publish anything you build 
on top of that (even if used only internally) but also that you cannot 
incorporate arrangement_2 code into any GPL software.

See http://www.cgal.org/license.html for the sad details.


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