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NN (normalnull: ‘nivel cero de altitud’, 'sobre el nivel del mar'), expresión en alemán para referirse a un sistema de referencia para las medidas de altitud de los accidentes geográficos en Alemania. En alemán Metern über dem Meeresspiegel o abreviadamente m ü. NN significa metros sobre el nivel del mar del Norte.
Wiernsheim is physically in the Heckengäu, a region characterized by wooded and karstified hills of muschelkalk. Elevation above sea level in municipal area ranges from a low of 274 meters (899 ft) Normalnull (NN) on the Kreuzbach and a high of 464 meters (1,522 ft) NN in the southwest. [3]
In mathematics, the word null (from German: null[citation needed] meaning "zero", which is from Latin: nullus meaning "none") is often associated with the concept of zero or the concept of nothing. [1] [2] It is used in varying context from "having zero members in a set " (e.g., null set) [3] to "having a value of zero " (e.g., null vector).
Height above mean sea level is a measure of a location's vertical distance ( height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods.
Net neutrality, the principle that Internet service providers should treat all data the same. Neural network, a group of interconnected nerve cells or a machine learning model inspired by one. Normalnull, a German height reference system preceding Normalhöhennull (NHN) nn, the chemical symbol for the hypothetical element Neutronium.
Das Normalnull (auch Normal-Null, abgekürzt NN oder N. N.) war von 1879 bis 1992 das festgelegte Nullniveau der amtlichen Bezugshöhe in Deutschland. Umgangssprachlich wird die nunmehr veraltete Bezeichnung über Normalnull und die Abkürzung mNN oft als Synonym für über dem Meeresspiegel verwendet, fälschlicherweise auch für Gebiete außerhalb Deutschlands.
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