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Height — is the measurement of vertical distance, but has two meanings in common use. It can either indicate how tall something is, or how high up it is. For example one could say That is a tall building , or That airplane is high up in the sky . These… … Wikipedia
Above mean sea level — The term above mean sea level (AMSL) refers to the elevation (on the ground) or altitude (in the air) of any object, relative to the average sea level datum. AMSL is used extensively in radio (both in broadcasting and other telecommunications… … Wikipedia
Datum (geodesy) — Geodesy Fundamentals Geodesy · … Wikipedia
height — i. The vertical distance of a level, a point or an object considered as a point, measured from a specified datum (ICAO). Height may be indicated as follows: (all above ground level) very low above ground level but below 500 ft; low 500 up to 2000 … Aviation dictionary
Metres above the Adriatic — The Adriatic datum Metres above the Adriatic (German: Meter über Adria)[1] is an elevation reference system used in Austria and some other European countries based on the average water level of the Adriatic Sea at the Molo Sartorio in Triest… … Wikipedia
Chart datum — US civil and maritime uses of tidal data A chart datum is the level of water that charted depths displayed on a nautical chart are measured from. A chart datum is generally a tidal datum; that is, a datum derived from some phase of the tide.… … Wikipedia
Ordnance Datum — In the British Isles, an Ordnance Datum or OD is a vertical datum used by an ordnance survey as the basis for deriving altitudes on maps. A spot height may be expressed as AOD for above ordnance datum . Usually mean sea level (MSL) is used for… … Wikipedia
Orthometric height — The orthometric height is the distance H along a line of force from a given point P at the physical surface of an object to the geoid. Orthometric heights are what are usually used in the US for ordinary engineering work. Values for measured… … Wikipedia
Sea Level Datum of 1929 — Geodesy Fundamentals Geodesy · … Wikipedia
List of mountains on Mars by height — This is a list of mountains on Mars by elevation. The listed elevations are relative to the Martian datum (the elevation defined as zero by average martian atmospheric pressure and planet radius). Elevation is NOT the height above the surrounding … Wikipedia
ILS (instrument landing system) reference datum — The point at a specified height that is located vertically above the intersection of the runway centerline and the threshold and through which the downward extended straight portion of the glide path passes … Aviation dictionary
