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  1. Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects : Commons. Free media repository. MediaWiki. Wiki software development. Meta-Wiki. Wikimedia project coordination. Wikibooks. Free textbooks and manuals.

  2. nl.wikipedia.org › wiki › NormalnullNormalnull - Wikipedia

    Normalnull (NN) was van 1879 tot 1992 het referentiepunt voor hoogtemetingen in Duitsland. Duitsland neemt de zeespiegel van de Noordzee bij Amsterdam als nulpunt van de schaal en heeft het Normalnull gelijkgesteld met het NAP. Tussen 1956 en 1992 werd in Oost-Duitsland het Kronstadtpeil gebruikt, net als in de andere Oostbloklanden . In 1993 ...

  3. en.wikipedia.org › wiki › ElevationElevation - Wikipedia

    Elevation. The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth 's sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum ). The term elevation is mainly used when referring to points on the Earth's ...

  4. www.wikipedia.orgWikipedia

    Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

  5. In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features ( terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation . In planetary science, vertical datums ...

  6. Heiligenberg (Heidelberg) The Heiligenberg is a large wooded hill overlooking the town of Heidelberg in Baden-Württemberg, Germany. It rises to around 440 metres NHN (short for normalhöhennull or "standard elevation zero," the equivalent of sea level in Germany).

  7. Usage. This template mirrors the one on German Wikipedia called de:Vorlage:Höhe for interpreting height data based on a range of systems. It is currently being used on Simple Wikipedia to assist translation of hundreds of articles, e.g. on railway lines, mountains, rivers and other geographical features that record the heights based on standard German, Austrian or Swiss reference points.