height datum
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Australian Height Datum — The Australian Height Datum is a geodetic datum for altitude measurement in Australia. According to Geoscience Australia, In 1971 the mean sea level for 1966 1968 was assigned the value of zero on the Australian Height Datum at thirty tide gauges … Wikipedia
Australian Height Datum — noun a mapping system applied to Australia which uses a datum, or agreed level, from which the heights of naturally occurring features can be measured; this level, to which the value of zero is given, is equivalent to the mean sea level for… …
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
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
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
North American Vertical Datum of 1988 — Geodesy Fundamentals Geodesy · … Wikipedia
Vernier height gauge — A vernier height gauge is a height gauge with the additional refinement of a vernier scale for greater accuracy in reading or setting the tool.The first image shows two height gauges, the left height gauge has the vernier scale, the right one has … 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
Sea Level Datum of 1929 — Geodesy Fundamentals Geodesy · … Wikipedia
