True north

From Glossary of Meteorology
Revision as of 16:21, 20 February 2012 by imported>Perlwikibot
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)



true north

The direction from any point on the earth's surface toward the geographic North Pole; the northerly direction along any projection of the earth's axis upon the earth's surface, for example, along a longitude line.

Except for much of navigational practice (which uses magnetic north), true north is the universal 0° (or 360°) mapping reference. True north differs from magnetic north by the magnetic declination at that geographic point.