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I am working on map applications with polygon MKOverlays. I have a requirement to merge (union) overlapping polygons.
Is there a well known algorithm to do this? Are there any free existing libraries/implementations that help with such geometry operations?
I have found the GEOS library, but apparently its licensing terms disallow use without distributing your source code. Is anyone else using this library. If yes, where can I find the way to include this in my Xcode project.
The only free libraries I’m aware of are –
Clipper:
http://angusj.com/delphi/clipper.php
Boost Polygon:
http://www.boost.org/doc/libs/1_47_0/libs/polygon/doc/index.htm
Boost Geometry:
http://trac.osgeo.org/ggl/