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origin - [coordinate systems] A fixed reference point in a coordinate system from which all other points are calculated, usually represented by the coordinates (0,0) in a planar coordinate system and (0,0,0) in a three-dimensional system. The center of a projection is not always its origin.
[Category=Geospatial ]
Source: esri, 28 June 2012 08:59:40, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation
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