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{{#invoke:Hatnote|hatnote}} {{ safesubst:#invoke:Unsubst||$N=Use dmy dates |date=__DATE__ |$B= }} {{#invoke:Hatnote|hatnote}} Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, and more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage.

Vertical distance measurements in the "down" direction are commonly referred to as depth.

Altitude sections
Intro  [[Altitude?section=_Altitude_in_aviation{{safesubst:#invoke:anchor|main}}| Altitude in aviation{{safesubst:#invoke:anchor|main}}]]  Altitude in atmospheric studies  Altitude effects on organisms  See also   References    External links   

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