Elevation
The elevation of a geographic location is its height above a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic system, vertical datum). Elevation, or geometric height, is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
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Famous quotes containing the word elevation:
“The stern hand of fate has scourged us to an elevation where we can see the great everlasting things which matter for a nation—the great peaks we had forgotten, of Honour, Duty, Patriotism, and, clad in glittering white, the great pinnacle of Sacrifice pointing like a rugged finger to Heaven.”
—David Lloyd George (1863–1945)
“Through all opposition the personal benefits of the reform [dress] [bracketed word in original] have compensated; but had it been mainly sacrifice, the thought of working for the amelioration of women and the elevation of humanity would still have been the beacon-star guiding me on amid all discouragements.”
—Susan Pecker Fowler (1823–1911)
“Understanding the spirit of our institutions to aim at the elevation of man, I am opposed to whatever tends to degrade them.”
—Abraham Lincoln (1809–1865)