CoordinateTransformationLibrary/README at master · gnucifer/CoordinateTransformationLibrary · GitHub

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   CoordinateTransformationLibrary - David Gustafsson 2012

   RT90, SWEREF99 and WGS84 coordinate transformation library

  This library is a PHP port of the .NET library by Björn Sållarp.
   calculations are based entirely on the excellent
   javscript library by Arnold Andreassons.

  Source: http://www.lantmateriet.se/geodesi/
  Source: Arnold Andreasson, 2007. http://mellifica.se/konsult
  Source: Björn Sållarp. 2009. http://blog.sallarp.com
  Source: Mathias Åhsberg, 2009. http://github.com/goober/
  Author: David Gustafsson, 2012. http://github.com/david-xelera/

  License: http://creativecommons.org/licenses/by-nc-sa/3.0/