Editing Magnetic declination (section)

==External links==
* [http://geomag.usgs.gov USGS Geomagnetism Program]
* [http://www.magnetic-declination.com Looks up your IP address location and tells you your declination.]
* [https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml Online declination calculator at the National Geophysical Data Center (NGDC)]
* [https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml Online declination and field strength calculator at the NGDC]
* [https://www.ngdc.noaa.gov/geomag/calculators/mobileDeclination.shtml Mobile web-app for magnetic declination at the NGDC]
* [https://web.archive.org/web/20130712114533/http://maps.ngdc.noaa.gov/viewers/historical_declination/ Historical magnetic declination viewer at the NGDC]
* [http://geomag.nrcan.gc.ca/apps/mdcal-eng.php Magnetic declination calculator at Natural Resources Canada]{{Dead link|date=August 2023 |bot=InternetArchiveBot |fix-attempted=yes }}
* [http://geomag.org/models/WMM/WMMGSpreadsheet.htm A Google spreadsheet application to bulk calculate magnetic declination]
* [https://www.ncei.noaa.gov/products/world-magnetic-model World Magnetic Model source code download site]

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[[Category:Orientation (geometry)]]
[[Category:Geomagnetism]]
[[Category:Angle]]