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I need to perform vector overlay operation on any two map layers as ArcGIS and Grass GIS performs. I am wondering is there any API or library ( in C, C++ or Java) so that I can use that third party library for my GIS project. I am looking forward to find intersection between two map layers using that library.

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A couple geometry libraries I'm aware of include:

  • Java Topology Suite, JTS
  • Geometry Engine Open Source, GEOS

OGR provides read/write access to many spatial formats and includes many, if not all, of the spatial operations provided by GEOS.

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