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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.
- Above mean sea level
The term above mean sea level ( AMSL) is the elevation or...
- Orthometric height
Orthometric height is one of the scientific formalizations...
- Past sea level
The current sea level is about 130 metres higher than the...
- Above mean sea level
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]
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.
Altitude means height above the ground or above the sea level. Common uses include aviation (flying, parachuting, gliding), and geography / surveying . In geometry it is also used as the height of the object itself.
