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What is height above mean sea level?
What is above mean sea level (AMSL)?
Why is sea level called 'average'?
What is the difference between sea level and mean sea level?
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.
- Sea level - Wikipedia
The term APSL means above present sea level, comparing sea...
- Above mean sea level - Simple English Wikipedia, the free ...
The term above mean sea level ( AMSL) is the elevation or...
- Sea level - Simple English Wikipedia, the free encyclopedia
Sea level is generally used to refer to mean sea level...
- Sea level - Wikipedia
The term APSL means above present sea level, comparing sea levels in the past with the level today. Earth's radius at sea level is 6,378.137 km (3,963.191 mi) at the equator. It is 6,356.752 km (3,949.903 mi) at the poles and 6,371.001 km (3,958.756 mi) on average. [4]
The term above mean sea level ( AMSL) is the elevation or altitude used by engineers to determine the coverage area a station will be able to reach. It is also used in aviation, where most heights are recorded and reported in AMSL (see flight level ), and in the atmospheric sciences .
Sea level is generally used to refer to mean sea level (MSL). This is the average level for the surface of one or more of Earth's oceans. MSL is a type of standardised geodetic reference point. It is used, for example, as a geodetic datum in cartography and marine navigation.
The current sea level is about 130 metres higher than the historical minimum. Historically low levels were reached during the Last Glacial Maximum (LGM), about 20,000 years ago. The last time the sea level was higher than today was during the Eemian, about 130,000 years ago.
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.
Nov 4, 2020 · The vertical datum used by surveyors across the country is mean sea level, obtained through a tide gauge. Of course, measuring the sea is a lot trickier than measuring the floor in your house to check a person’s height.
