Spatial reference system

Geodesy
Fundamentals
Geodesy Geodynamics Geomatics Cartography
Concepts
Datum Distance Geoid Fig. Earth Geodetic system Geodesic Geog. coord. system Hor. pos. represent. Lat. / Long. Map proj. Ref. ellipsoid Satellite geodesy Spatial ref. system
Technologies
GNSS GPS GLONASS Galileo Compass
Standards
ED50 ETRS89 GRS 80 NAD83 NAVD88 SAD69 SRID UTM WGS84
History
History of geodesy NAVD29

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 of systems in existence 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
• Military grid reference system
• United States National Grid

See also

• Geodesy
• Geographic information system (GIS).
• Liste of National Coordinate Reference Systems

External links

• spatialreference.org – A website that defines spatial reference systems, in a variety of formats.