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Mean sea level is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured.
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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.
Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and ...
The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the ...
This is a list of countries and territories by their average elevation above sea level based on the data published by Central Intelligence Agency, ...
This list includes the topographic elevations of each of the 50 U.S. states, the District of Columbia, and the U.S. territories.
The following sortable table lists land surface elevation extremes by country or dependent territory. Map of countries coloured according to their highest ...