Meters above sea level

Meters above sea Level is a standard metric measurement of the elevation of a location in reference to historic mean sea level; the determination of what actually constitutes mean sea level over time however, may be determined by other parameters, such as the effects of climate history and climate change, and may have differed in the past, as well as in the future, from that established by historic, modern, documented elevations.

Uses

Meters above sea level is the standard measurement of the elevation or altitude of:

• a geographic location such as a town, mountain, or other landmark
• the elevation of the top of a building or other structure
• or the altitude of an airplane or other flying object.

How determined

The elevation or altitude in Meters above sea level of any location, object, or point, can be determined in a number of ways. The most common include:

• Global Positioning System (GPS) which triangulates its location in reference to multiple satellite
• an altimeter, which typically measures atmospheric pressure, which decreases as altitude increases.
• a topographic map or digital elevation model map, for which elevations have been determined by aerial photography or surveying.

Other measurement systems

feet above sea level is the most common analogue for meters above sea level in the American measurement system.

Abbreviations

Meters above sea level is sometimes abbreviated as m.a.s.l. or m.s.l.<ref name...
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