Normalhöhennull (German pronunciation: [nɔʁmaːlˈhøːənˌnʊl], "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).
Normalhöhennull (German pronunciation: [nɔʁmaːlˈhøːənˌnʊl], "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).
Source: Wikipedia "Normalhöhennull" · CC BY-SA 4.0
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