. . . . . . . "altitude"@en . . . . . . . . . . . "altitude"@en . "altitude"@en . . . . . . . . . . . . . . . . . . . . . "height in relation to a certain reference point; (general) 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"@en . .