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Spatial reference system : ウィキペディア英語版 | Spatial reference system
A spatial reference system (SRS) or coordinate reference system (CRS) is a coordinate-based local, regional or global system used to locate geographical entities. A spatial reference system defines a specific map projection, as well as transformations between different spatial reference systems. Spatial reference systems are defined by the OGC's Simple feature access using well-known text, and support has been implemented by several standards-based geographic information systems. Spatial reference systems can be referred to using a SRID integer, including EPSG codes defined by the International Association of Oil and Gas Producers. Some systems are: *Universal Transverse Mercator coordinate system *British national grid reference system *Hellenic Geodetic Reference System 1987 *Irish grid reference system *Irish Transverse Mercator *Israeli Transverse Mercator *Israeli Cassini Soldner *Jordan Transverse Mercator *Lambert conformal conic projection *International mapcode system *Military grid reference system *United States National Grid It is specified in ISO 19111:2007 Geographic information—Spatial referencing by coordinates, also published as OGC Abstract Specification, Topic 2: Spatial referencing by coordinate.() ==See also==
*Geodesy *Geographic information system (GIS). * List of National Coordinate Reference Systems
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