http://home.online.no/~sigurdhu/WGS84_Eng.html
http://en.wikipedia.org/wiki/WGS84
http://earth-info.nga.mil/GandG/wgs84/
http://earth-info.nga.mil/GandG/publications/tr8350.2/tr8350_2.html
http://en.wikipedia.org/wiki/WGS84
http://earth-info.nga.mil/GandG/wgs84/
http://earth-info.nga.mil/GandG/publications/tr8350.2/tr8350_2.html
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