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Normalhöhennull ("standard elevation zero") or NHN is a vertical datum used in Germany. In geographical terms, NHN is the reference plane for the normal height of a topographical eminence height above mean sea level used in the 1932 German Mean Height Reference System ( Deutsches Haupthöhennetz ). [1]
Normalnull ("standard zero") or Normal-Null (short N. N. or NN) is an outdated official vertical datum used in Germany.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 Normalnull has been replaced by Normalhöhennull (NHN).
In contrast, the zero level surface of the normal heights since 1992 (DHHN92, DHHN2016) is refered to as Normalhöhennull (NHN). It is realized by quasigeoid models (DHHN92: GCG05/GCG2011, DHHN2016: GCG2016).
Normalhöhennull ("standard elevation zero") or NHN is a standard reference level, the equivalent of sea level, used in Germany to measure height. In geographical terms, NHN is the reference plane for the normal height of a topographical eminence above sea level used in the 1992 German Mean Height Reference System ( Deutsches Haupthöhennetz ...
Das Normalnull (auch Normal-Null, abgekürzt NN oder N. N.) war von 1879 bis 1992 das festgelegte Nullniveau der amtlichen Bezugshöhe in Deutschland.
Normalhöhennull ("standard elevation zero") or NHN is a standard reference level, the equivalent of sea level, used in Germany to measure height. In geographical terms, NHN is the reference plane for the normal height of a topographical eminence above sea level used in the 1992 German Mean Height Reference System ( Deutsches Haupthöhennetz ...
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 ...
