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- True_north abstract "True north (geodetic north) is the direction along the earth's surface towards the geographic North Pole.True geodetic north differs from magnetic north (the direction a compass points toward the magnetic north pole), and from grid north (the direction northwards along the grid lines of a map projection). Geodetic true north also differs very slightly from astronomical true north (typically by a few arcseconds) because the local gravity may not point at the exact rotational axis of the earth.The direction of astronomical true north is marked in the skies by the north celestial pole. This is within about 1 degree of the position of Polaris, so that the star appears to trace a tiny circle in the sky each day. Due to the axial precession of the Earth, true north rotates in an arc with respect to the stars that takes approximately 25,000 years to complete. Around the year 2100 to 2102, Polaris will make its closest approach to the celestial north pole (extrapolated from recent Earth precession). Five thousand years ago, the closest visible star to the celestial north pole was Thuban.On maps published by the United States Geological Survey and the United States Armed Forces, true north is marked with a line terminating in a five-pointed star. The east and west edges of the USGS topographic quadrangle maps of the United States are meridians of longitude, thus indicating true north (so they are not exactly parallel). Maps issued by the United Kingdom Ordnance Survey contain a diagram showing the difference between true north, grid north, and magnetic north at a point on the sheet; the edges of the map are likely to follow grid directions rather than true, and the map will thus be truly rectangular/square.".
- True_north wikiPageID "3666492".
- True_north wikiPageLength "2882".
- True_north wikiPageOutDegree "19".
- True_north wikiPageRevisionID "696783781".
- True_north wikiPageWikiLink Axial_precession.
- True_north wikiPageWikiLink Category:Arctic_geography_terminology.
- True_north wikiPageWikiLink Category:Cartography.
- True_north wikiPageWikiLink Category:Chinese_discoveries.
- True_north wikiPageWikiLink Category:Navigation.
- True_north wikiPageWikiLink Category:Orientation_(geometry).
- True_north wikiPageWikiLink Celestial_pole.
- True_north wikiPageWikiLink Geodesy.
- True_north wikiPageWikiLink Grid_north.
- True_north wikiPageWikiLink Map_projection.
- True_north wikiPageWikiLink Minute_and_second_of_arc.
- True_north wikiPageWikiLink North_Magnetic_Pole.
- True_north wikiPageWikiLink North_Pole.
- True_north wikiPageWikiLink Ordnance_Survey.
- True_north wikiPageWikiLink Polaris.
- True_north wikiPageWikiLink Thuban.
- True_north wikiPageWikiLink United_Kingdom.
- True_north wikiPageWikiLink United_States_Armed_Forces.
- True_north wikiPageWikiLink United_States_Geological_Survey.
- True_north wikiPageWikiLinkText "True north".
- True_north wikiPageWikiLinkText "True north, concept of".
- True_north wikiPageWikiLinkText "geographic (true) north".
- True_north wikiPageWikiLinkText "geographic north".
- True_north wikiPageWikiLinkText "north".
- True_north wikiPageWikiLinkText "polar north".
- True_north wikiPageWikiLinkText "true headings".
- True_north wikiPageWikiLinkText "true north".
- True_north wikiPageWikiLinkText "true".
- True_north wikiPageUsesTemplate Template:Cite_book.
- True_north wikiPageUsesTemplate Template:Geo-term-stub.
- True_north wikiPageUsesTemplate Template:Other_uses.
- True_north wikiPageUsesTemplate Template:Refimprove.
- True_north wikiPageUsesTemplate Template:Reflist.
- True_north subject Category:Arctic_geography_terminology.
- True_north subject Category:Cartography.
- True_north subject Category:Chinese_discoveries.
- True_north subject Category:Navigation.
- True_north subject Category:Orientation_(geometry).
- True_north hypernym Direction.
- True_north type Company.
- True_north type RecordLabel.
- True_north type Infographic.
- True_north type Redirect.
- True_north type Science.
- True_north comment "True north (geodetic north) is the direction along the earth's surface towards the geographic North Pole.True geodetic north differs from magnetic north (the direction a compass points toward the magnetic north pole), and from grid north (the direction northwards along the grid lines of a map projection).".
- True_north label "True north".
- True_north sameAs Q339264.
- True_north sameAs Nord_veritable.
- True_north sameAs Norte_verdadero.
- True_north sameAs شمال_حقیقی.
- True_north sameAs Napapohjoinen.
- True_north sameAs Vrai_Nord.
- True_north sameAs צפון_אמיתי.
- True_north sameAs Rétt_norður.
- True_north sameAs 真北.
- True_north sameAs 진북.
- True_north sameAs Ware_noorden.
- True_north sameAs Rett_nord.
- True_north sameAs Rett_nord.
- True_north sameAs Norte_verdadeiro.
- True_north sameAs m.09t8qy.
- True_north sameAs உண்மை_வடக்கு.
- True_north sameAs Gerçek_kuzey.
- True_north sameAs Q339264.
- True_north sameAs 真北.
- True_north wasDerivedFrom True_north?oldid=696783781.
- True_north isPrimaryTopicOf True_north.