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  2. Geographic coordinate conversion - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate...

    Coordinate conversion is composed of a number of different types of conversion: format change of geographic coordinates, conversion of coordinate systems, or transformation to different geodetic datums. Geographic coordinate conversion has applications in cartography, surveying, navigation and geographic information systems.

  3. Wikipedia:Obtaining geographic coordinates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Obtaining...

    Click the email icon. The geographical coordinates are embedded in the email link which is then displayed. The coordinates are the two numbers displayed immediately after the letters "cp=". The latitude and longitude are separated by a tilde ( ~ ). The latitude is displayed first, and both coordinates are displayed in decimal degrees format.

  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. Geohash-36 - Wikipedia

    en.wikipedia.org/wiki/Geohash-36

    Compared to storing GPS coordinates using the Decimal datatype in SQL the Geohash-36 does not save significantly on database bytes. Using DECIMAL(8,5) and DECIMAL(7,5) requires 10-bytes [3] and is accurate to about 1.1 metre squared (or better further from the equator). An equivalent 10-bytes of the Geohash-36 code is accurate to approximately ...

  6. Web Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Web_Mercator_projection

    Formulas for the Web Mercator are fundamentally the same as for the standard spherical Mercator, but before applying zoom, the "world coordinates" are adjusted such that the upper left corner is (0, 0) and the lower right corner is ( , ): [7] = ⌊ (+) ⌋ = ⌊ (⁡ [⁡ (+)]) ⌋ where is the longitude in radians and is geodetic latitude in radians.

  7. Earth-centered inertial - Wikipedia

    en.wikipedia.org/wiki/Earth-centered_inertial

    MOD: a Mean of Date (MOD) frame is defined using the mean equator and equinox on a particular date. TEME: the ECI frame used for the NORAD two-line elements is sometimes called true equator, mean equinox (TEME) although it does not use the conventional mean equinox.

  8. Template:CH1903-WGS84 - Wikipedia

    en.wikipedia.org/wiki/Template:CH1903-WGS84

    This template is designed to convert a set of Swiss coordinates into either the corresponding WGS84 decimal latitude or longitude. It is intended to facilitate the usage of geodata (see {{ coord }} ) in articles about subjects for which only Swiss coordinates are readily available.

  9. Helmert transformation - Wikipedia

    en.wikipedia.org/wiki/Helmert_transformation

    Convert from geodetic coordinates to geocentric coordinates: Calculation of x, y and z relative to the reference ellipsoid of surveying 7-parameter transformation (where x , y and z almost always change by a few hundred metres at most, and distances by a few mm per km).