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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.
In Hong Kong, "mPD" is a surveying term meaning "metres above Principal Datum" and refers to height of 0.146 m (5.7 in) above chart datum [8] and 1.304 m (4 ft 3.3 in) below the average sea level. In France, the Marégraphe in Marseilles measures continuously the sea level since 1883 and offers the longest collated data about the sea level.
The orthometric height (symbol H) is the vertical distance along the plumb line from a point of interest to a reference surface known as the geoid, the vertical datum that approximates mean sea level. [1] [2] Orthometric height is one of the scientific formalizations of a layman's "height above sea level", along with other types of heights in ...
sea level 521 m 1,709 ft United States Virgin Islands: Crown Mountain on Saint Thomas: 474 m 1,555 ft Caribbean Sea: sea level 474 m 1,555 ft Wallis and Futuna: Mont Puke on Futuna: 524 m 1,719 ft South Pacific Ocean: sea level 524 m 1,719 ft Yemen: Jabal An-Nabi Shu'ayb: 3666 m 12,028 ft Arabian Sea: sea level 3666 m 12,028 ft Zambia: Mafinga ...
This list of the highest cities in the world includes only cities with a population greater than 100,000 inhabitants and an average height above sea level over 2,000 metres (6,600 ft). This list is incomplete ; you can help by adding missing items .
This is a list of countries and territories by their average elevation above sea level based on the data published by Central Intelligence Agency, [1] unless another source is cited. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.
It is 5,052 m (16,575 ft) above sea level according to the INEI in Peru. [2] 5,070 metres (16,630 ft) Tuiwa, Tibet Autonomous Region China [3] 5,011 metres (16,440 ft) Chasangcun, Tibet Autonomous Region China: 4,980 metres (16,340 ft) Rongbuk Monastery, Tibet Autonomous Region China: 4,950 metres (16,240 ft) Shuanghu, Tibet Autonomous Region China
Pressure as a function of the height above the sea level. The human body can perform best at sea level, [7] where the atmospheric pressure is 101,325 Pa or 1013.25 millibars (or 1 atm, by definition). The concentration of oxygen (O 2) in sea-level air is 20.9%, so the partial pressure of O 2 (pO 2) is 21.136 kilopascals (158.