Magnetic Variation

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Link Semantic Value
Term Magnetic Variation
Status


Mandatory for


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Broader term


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Abbreviation

  • MagVar

Definition

The angular difference between True North and Magnetic North measured at a given position and date.

Definition Source

  • AIFDD

Note

The value given indicates whether the angular difference is East (positive) or West (negative) of True North. True North is the direction of the northern point at which the geographic meridian lines meet.