NOAA officials announced today the World Magnetic Model (WMM), a representation of Earth’s large-scale magnetic field and an indispensable complement to GPS devices used by NATO, the United States and United Kingdom militaries, as well as civil applications ranging from mineral exploration to smartphone apps, has been updated. For more information, please visit: http://www.noaanews.noaa.gov/stories2014/20141215_worldmagneticmodel.html

You can download the new model and software at:
http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml