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Magnetic declination or variation is the angle on the horizontal plane between magnetic north ... Sound), below, surveyed 124 years apart. The 1884 chart shows a variation of 8 degrees, 20 minutes West. The 2008 chart shows 13 degrees, ...


Magnetic declination (variation) calculator based on the IGRF magnetic field model. Estimates magnetic delination world-wide from 1900 - present.


Find your location or click on the map to display your magnetic declination, Browse countries What is Magnetic Declination?


Feb 24, 2017 ... This calculator may be used to calculate the magnetic declination for a specified location and date based on the International Geomagnetic ...


Mar 20, 2017 ... Learn what declination is and how to adjust it on a compass. ... a map pointing to the difference between magnetic north and true north.


Magnetic declination adjustment values are easy to determine with these helpful map charts and page links.


Learn about magnetic declination effecting compass directions. ... Using this old map, the declination would be about 11 degrees East in 2010 - about 1 degree ...


A diagram in the map margin will show the difference (declination) at the centre of the map between magnetic north and true north. Where magnetic north is west  ...


May 2, 2017 ... How to adjust the magnetic declination on a compass and orient it with a USGS topographic map.


An online calculator for the future geomagnetic main field.