. . . . "Altitude"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "http://dbpedia.org/resource/Altitude"^^ . . . . "Altitude or height 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. [Wikipedia]" . . .