Normalnull
Normalnull ("standard zero") or Normal-Null (short N. N. or NN) is an outdated official vertical datum used in Germany. Elevations using this reference system were to be marked Meter über Normal-Null (“meters above standard zero”). Normalnull has been replaced by Normalhöhennull (NHN).
History
In 1878 reference heights were taken from the Amsterdam Ordnance Datum and transferred to the New Berlin Observatory in order to define the Normalhöhenpunkt 1879. Normalnull has been defined as a level going through an imaginary point 37.000 m below Normalhöhenpunkt 1879. When the New Berlin Observatory was demolished in 1912 the reference point was moved east to the village of [[Hoppegarten|
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]] (now part of the town of Müncheberg, Brandenburg, Germany).[1]
References
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: Was ist "Normal-Null"?. In: Physikalische Blätter 1958, vol 14, issue 2, p. 62–66 ISSN 1521-3722 doi:10.1002/phbl.19580140203This page is a redirect. The following categories are used to track and monitor this redirect:- From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
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[ ⚑ ] 52°30′12″N 13°23′35″E / 52.5034°N 13.3930°E
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