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Thank You

Download Legacy C Software and the World Magnetic Model Coefficients with executables for Windows and Linux

  • C source code, executable, and latest WMM (zip file )
  • WMM Technical Report and Test Values (pdf file)
  • Maps in pdf format (45 maps of the magnetic elements and their secular variation)
Note: This heritage software takes height ABOVE ELLIPSOID as user input. Note that the new WMM software allows heights to be specified above ellipsoid or above mean sea level. For comparisons between the old and new software, please make sure to use the same height option.


Last Modified on: Tuesday, 29-Nov-2016 23:12:26 UTC
NOAA > NESDIS > NCEI (formerly NGDC)
Maintained by: geomag.models@noaa.gov