Compass North

Last Updated on Tuesday, 20 May 2008 08:36

Magnetic north is the direction indicated by a magnetic compass.

True north is the direction of a meridian of longitude which converges on the North Pole.

Grid north is the direction northwards along the grid lines of a map projection.

Ordnance Survey maps indicate the difference between grid north, true north, and magnetic north.

Declination is the vertical angle of difference between true north and magnetic north.

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