Definition: Datum

Geographic Information Systems

Parameter or set of parameters that define the position of the origin, the scale, and the orientation of a coordinate system, in accordance with EN ISO 19111.
European Union, Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services, Official Journal of the European Union No L 323, 8.12.2010, p. 11 – 102

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