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magnetic declination - [geodesy] The angle between magnetic north and true north observed from a point on the earth. Magnetic declination varies from place to place, and changes over time, in response to changes in the earth's magnetic field.
[Category=Geospatial ]
Source: esri, 03 June 2012 08:08:58, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation
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