Everything about The Elevation totally explained
The
elevation of a
geographic location is its height above a fixed reference point, often the
mean sea level. 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.
Less commonly, elevation is measured using the center of the Earth as the reference point. Due to
equatorial bulge, there's debate whether the summits of
Mt. Everest or
Chimborazo are at the higher elevation, as the Chimborazo summit is further from the Earth's center while the Mt. Everest summit is higher above mean sea level.
Maps and GIS
A
topographical map is the main type of
map used to depict elevation, often through use of
contour lines.
In a
Geographic Information System (GIS),
digital elevation models (DEM) are commonly used to represent the surface (topography) of a place, through a
raster (grid) dataset of elevations.
Digital terrain models are another way to represent terrain in GIS.
To determine elevation of a place, it must be
surveyed, in reference to a
ground control point.
Topography
The elevation of a
mountain usually refers to its
summit. The elevation of a hill also refers to the summit. A valley's elevation is
usually taken from the lowest point but is often taken all over the valley.
Further Information
Get more info on 'Elevation'.
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