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Elevation or altitude is generally expressed as "metres above mean sea level" in the metric system, or "feet above mean sea level" in United States customary and imperial units. Common abbreviations in English are: AMSL – above mean sea level [3] ASL – above sea level [4] FAMSL – feet above mean sea level [5] FASL – feet above sea level [6]
Height above mean sea level (AMSL) is the elevation (on the ground) or altitude (in the air) of an object, relative to a reference datum for mean sea level (MSL). It is also used in aviation, where some heights are recorded and reported with respect to mean sea level (contrast with flight level ), and in the atmospheric sciences , and in land ...
In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL [1] or HAGL) is a height measured with respect to the underlying ground surface.This is as opposed to height above mean sea level (AMSL or HAMSL), height above ellipsoid (HAE, as reported by a GPS receiver), or height above average terrain (AAT or HAAT, in broadcast engineering).
Originally known as Sea Level Datum of 1929, NGVD 29 was determined and published by the United States Coast and Geodetic Survey [2] and used to measure the elevation of a point above and depression below mean sea level (MSL).
Immediately east of town, State Route 120 climbs from about 910 feet (280 m) AMSL elevation to about 2,450 feet (750 m) at Priest Station, California, over a distance of 4.5 miles (10 km). Old Priest Grade, a narrower road and predecessor to the current route of SR120, covers the same change in elevation over about 1.8 miles (2.9 km).
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Flying Cloud Airport covers an area of 543 acres (220 ha) at an elevation of 906 feet (276 m) above mean sea level.It has three asphalt paved runways.. For the 12-month period ending December 31, 2022, the airport had 122,281 aircraft operations, an average of 335 per day: 96% general aviation, 3% air taxi, <1% commercial, and <1% military.
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