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- between two map coordinate systems, longitude/latitude and
- Universal Transverse Mercator (UTM). It uses the Clarke
- 1866 spheroid, which has been adopted by Canada and the
- U.S. (except Hawaii). As different countries use different
- spheroids (i.e., formulas for describing the shape of the
- Earth; there are five major spheroids in all), Geo
- Converter works only for the west longitudes of the
- northern hemisphere, that is, between the Aleutian Islands
- of Alaska to Greenwich, England, and between the equator
- and 84 degrees N. This includes, of course, all of North
- America.