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Sign referring to Normal-Null. Normalnull ("standard zero") or Normal-Null (short N. N. or NN) is an outdated official vertical datum used in Germany.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”).
In 1993 is het Normalnull vervangen door het Normalhöhennull. Bronnen S. German ... Wikipedia® is een geregistreerd handelsmerk van de Wikimedia ...
Used as a geodesic reference point for geographical altitude in Germany from 1879–1992, replaced by Normalhöhennull in 1993. Declension ... Wikipedia de; Retrieved ...
It rises to around 440 metres NHN (short for normalhöhennull or "standard elevation zero," the equivalent of sea level in Germany). It has been the site of many historic and pre-historic constructions, including a Celtic hilltop fortification, a Roman sacred precinct, several medieval monasteries, modern lookout towers and the Heidelberg Thingstätte , built by the Nazis in the 1930s.
This page was last edited on 25 January 2024, at 12:28 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.
Vertical datums in Europe. 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.
