Download of egm84-15.tar.bz2 (egm84-15.tar.bz2 ( external link: SF.net): 1,475,184 octetos) 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
