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The history of longitude describes the centuries-long effort by astronomers, cartographers and navigators to discover a means of determining the longitude of any given place on Earth. The measurement of longitude is important to both cartography and navigation. In particular, for safe ocean navigation, knowledge of both latitude and longitude ...
Geodetic latitude and geocentric latitude have different definitions. Geodetic latitude is defined as the angle between the equatorial plane and the surface normal at a point on the ellipsoid, whereas geocentric latitude is defined as the angle between the equatorial plane and a radial line connecting the centre of the ellipsoid to a point on the surface (see figure).
Relief map of USA Alaska.png. Map of Alaska (click on map to see larger image) Module:Location map/data/USA Alaska is a location map definition used to overlay markers and labels on an equirectangular projection map of the U.S. state of Alaska. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
Module:Location map/data/USA Washington, D.C. is a location map definition used to overlay markers and labels on an equirectangular projection map of Washington, D.C.. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
64th parallel north. The 64th parallel north is a circle of latitude that is 64 degrees north of the Earth's equatorial plane. It crosses the Atlantic Ocean, Europe, Asia and North America . At this latitude the sun is visible for 21 hours, 1 minute during the summer solstice and 4 hours, 12 minutes during the winter solstice .
Informally, specifying a geographic location usually means giving the location's latitude and longitude. The numerical values for latitude and longitude can occur in a number of different units or formats: [2] sexagesimal degree: degrees, minutes, and seconds : 40° 26′ 46″ N 79° 58′ 56″ W
Location map of Central America. / 12.5; -85. Module:Location map/data/Central America is a location map definition used to overlay markers and labels on an equirectangular projection map of Central America. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame) is a global datum reference or reference frame for unambiguously representing the position of locations on Earth by means of either geodetic coordinates (and related vertical coordinates) or geocentric coordinates. [1]