Normalnull

<span title="German-language text"><i lang="de">Normalnull</i></span>

Normalnull

Outdated official vertical datum used in Germany

Normalnull ("standard zero") or Normal-Null (short N. N. or NN) is an outdated official vertical datum used in Germany.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 Normalnull has been replaced by Normalhöhennull (NHN).

Sign referring to Normal-Null

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 (now part of the town of Müncheberg, Brandenburg, Germany).[1]

References

  1. [1]
    S. German: Was ist "Normal-Null"?. In: Physikalische Blätter 1958, vol 14, issue 2, p. 62–66 ISSN 1521-3722 doi:10.1002/phbl.19580140203
Stub icon

This cartography or mapping term article is a stub. You can help Wikipedia by expanding it.

52.5034°N 13.3930°E / 52.5034; 13.3930
Share this article:

This article uses material from the Wikipedia article Normalnull, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.