Altitude
Altitude is the
elevation of an object from a known level or
datum, called
zero level. Most often this level is defined as the absolute sea level, but it can vary.
In
aviation, the term
altitude is used to describe elevation above
mean sea level, as opposed to
height (which refers to elevation above a ground reference point) or
flight level (the elevation according to a standard pressure
altimeter setting).
In North America and the UK altitude is usually measured in feet. In continental Europe and other parts of the world altitude is measured in metres.
See Also
In geometry, an altitude of a triangle is a line passing through one vertex and being perpendicular to the opposite side. See altitude (triangle).\n
simple:Height