Download of wmm2020.exe (wmm2020.exe ( external link: SF.net): 1,417,391 bytes) will begin shortly. If not so, click link on the left.
GeographicLib is a small set of C++ classes for converting between geographic, UTM, UPS, MGRS, and geocentric coordinates, for gravity (e.g., EGM2008), geoid, and geomagnetic field (e.g., WMM2010) calculations, and for solving geodesic problems. For documentation, visit http://geographiclib.sf.net
