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  2. History of longitude - Wikipedia

    en.wikipedia.org/wiki/History_of_longitude

    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 ...

  3. Local coordinates - Wikipedia

    en.wikipedia.org/wiki/Local_coordinates

    In Cartography and Maps, the traditional way of works are local datum. With a local datum the land can be mapped on relative small areas as a country. With the need of global systems, the transformations on between datum became a problem, so geodetic datum have been created. More than 150 local datum have been used in the world. See also

  4. Geodetic coordinates - Wikipedia

    en.wikipedia.org/wiki/Geodetic_coordinates

    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).

  5. Longitude by chronometer - Wikipedia

    en.wikipedia.org/wiki/Longitude_by_chronometer

    Longitude by chronometer. Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during the first half of the eighteenth century. It is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any ...

  6. Module:Location map/data/USA Washington, D.C. - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    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.

  7. n-vector - Wikipedia

    en.wikipedia.org/wiki/N-vector

    n. -vector. The n-vector representation (also called geodetic normal or ellipsoid normal vector) is a three-parameter non-singular representation well-suited for replacing geodetic coordinates ( latitude and longitude) for horizontal position representation in mathematical calculations and computer algorithms. Geometrically, the n -vector for a ...

  8. Module:Location map/data/USA Pittsburgh - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    Module:Location map/data/USA Pittsburgh is a location map definition used to overlay markers and labels on an equirectangular projection map of Pittsburgh. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

  9. Module:Location map/data/Canada Vancouver City - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    Location map of Vancouver City. / 49.2745; -123.067. Module:Location map/data/Canada Vancouver City is a location map definition used to overlay markers and labels on an equirectangular projection map of Vancouver City. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

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