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Altitude - definition(s)


(1) [coordinate systems] The height or vertical elevation of a point above a reference surface. Altitude measurements are usually based on a given reference datum, such as mean sea level.

(2) [map display] The height above the horizon, measured in degrees, from which a light source illuminates a surface. Altitude is used when calculating a hillshade, or for controlling the position of a light source in a scene.

[Category=Geospatial ]

Source: esri, 15 January 2012 09:53:56, External 

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