("standard zero") or (short N. N. or NN ) is an outdated official

vertical datum 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 str ...

used in Germany. Elevations using this reference system were to be marked (“meters above standard zero”). has been replaced by (NHN).

History

In 1878 reference heights were taken from the

Amsterdam Ordnance Datum Amsterdam Ordnance Datum or ' (NAP) is a vertical datum in use in large parts of Western Europe. Originally created for use in the Netherlands, its height was used by Prussia in 1879 for defining ', and in 1955 by other European countries. In the ...

and transferred to the New Berlin Observatory in order to define the . has been defined as a level going through an imaginary point 37.000 m below . 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 Müncheberg is a small town in Märkisch-Oderland, Germany approximately halfway between Berlin and the border with Poland, within the historic region of Lubusz Land. Geography Prior to 2003 the area today covered by Müncheberg was organized as ...

Brandenburg Brandenburg (; nds, Brannenborg; dsb, Bramborska ) is a state in the northeast of Germany bordering the states of Mecklenburg-Vorpommern, Lower Saxony, Saxony-Anhalt, and Saxony, as well as the country of Poland. With an area of 29,480 sq ...

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

).S. German: ''Was ist "Normal-Null"?''. In: ''Physikalische Blätter'' 1958, vol 14, issue 2, p. 62–66

References

{{Authority control Vertical datums Geography of Germany Zero-level elevation points