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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.
- Sea level - Wikipedia
The term above sea level generally refers to above mean 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
The sea level is the average height of the ocean (informally...
- Sea level - Wikipedia
Aviation altitude is measured using either mean sea level (MSL) or local ground level (above ground level, or AGL) as the reference datum. Pressure altitude divided by 100 feet (30 m) is the flight level , and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions).
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.
Elevation means the height of something above sea level. The highest point in the U.S. is Denali at 20,320 feet (6,194 m) above sea level. The lowest point on land in the U.S. is Badwater in Death Valley at 282 feet (86 m) below sea level. List. Images. Mount McKinley, highest point in the United States.
