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| 1. | - What is Reference Systems? | 
| Answer» reference system - a system that uses coordinates to establish position A system that used coordinates to establish position Reference System is defined as a system that uses coordinates to establish position. A system that uses coordinates to establish position reference system is defined as a system that uses coordinates to establish position A spatial reference system or coordinate reference system 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 Reference system is defined as a system that uses coordinates to establish position. Aspatial reference system(SRS) orcoordinate reference system(CRS) is acoordinate-basedlocal, regional or global system used to locate geographical entities. A spatial reference system defines a specificmap projection, as well as transformations between different spatial reference systems. Spatial reference systems are defined by theOGC'sSimple Feature Accessusingwell-known text representation of coordinate reference systems, and support has been implemented by severalstandards-basedgeographic information systems. Spatial reference systems can be referred to using aSRIDinteger, including EPSG codes defined by theInternational Association of Oil and Gas Producers. It is specified in ISO 19111:2007 Geographic information—Spatial referencing by coordinates, prepared byISO/TC 211, also published asOGCAbstract Specification, Topic 2: Spatial referencing by coordinate. a system that uses coordinate to establish position | |