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  1. 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 ...

  2. en.wikipedia.org › wiki › Sea_levelSea level - Wikipedia

    Geopotential height – Type of altitude above mean sea level; Height above average terrain – Height based on large area surrounding object; often used in U.S. for antenna towers; List of places on land with elevations below sea level; Meltwater pulse 1A – Period of rapid post-glacial sea level rise

  3. En el sistema anglosajón, la unidad equivalente es AMSL siglas de above mean sea level, que en español quiere decir «por encima del nivel promedio del mar». En los Países Bajos se usa el Normaal Amsterdams Peil (igualmente conocido por su abreviatura NAP, en español ‘Nivel normal de Ámsterdam’) es el nivel de referencia 0 del mar a ...

  4. en.wikipedia.org › wiki › AltitudeAltitude - Wikipedia

    Regions on the Earth's surface (or in its atmosphere) that are high above mean sea level are referred to as high altitude. High altitude is sometimes defined to begin at 2,400 meters (8,000 ft) above sea level. At high altitude, atmospheric pressure is lower than that at sea level.

  5. Orthometric height is one of the scientific formalizations of a laypersons' "height above sea level", along with other types of heights in Geodesy. In the US, the current NAVD88 datum is tied to a defined elevation at one point rather than to any location's exact mean sea level.