GeoDistance

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GeoDistance is a perl library which aims to provide as many tools to make it as simple as possible to calculate distances between geographic points, and anything that can be derived from that. Currently, there is support for finding the closest locations within a specified distance, to find the closest number of points to a specified point, and to do basic point-to-point distance calculations.

The library is free software. It can be redistributed and/or modified under the same terms as Perl itself.