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Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator or WGS 84/Pseudo-Mercator is a variant of the Mercator map projection and is the de facto standard for Web mapping applications. It rose to prominence when Google Maps adopted it in 2005. It is used by virtually all major online map providers, including Google Maps, CARTO, Mapbox, Bing Maps, OpenStreetMap, Mapquest, Esri, and many others. Its official EPSG identifier is EPSG:3857, although others have been used historically.
Well-known text representation of coordinate reference systems is a text markup language for representing spatial reference systems and transformations between spatial reference systems. The formats were originally defined by the Open Geospatial Consortium (OGC) and described in their Simple Feature Access and Well-known text representation of coordinate reference systems specifications. The current standard definition is ISO 19162:2019. This supersedes ISO 19162:2015.
EPSG Geodetic Parameter Dataset is a public registry of geodetic datums, spatial reference systems, Earth ellipsoids, coordinate transformations and related units of measurement, originated by a member of the European Petroleum Survey Group (EPSG) in 1985. Each entity is assigned an EPSG code between 1024 and 32767, along with a standard machine-readable well-known text (WKT) representation. The dataset is maintained by the IOGP Geomatics Committee.
References
- ↑ epsg.org
- ↑ "décret du 26 décembre 2000". www.legifrance.gouv.fr. Retrieved 27 December 2017.
- ↑ "Définition précise de la projection Lambert93 par l'IGN" (PDF). Retrieved 28 April 2022.
- ↑ "NSGI" . Retrieved 2021-05-03.
- ↑ "New Zealand Transverse Mercator". Land Information New Zealand. Retrieved 23 October 2018.
- ↑ "A Guide to Coordinate Systems in Great Britain" (PDF). Ordnance Survey. 2020. Retrieved 3 January 2023.
- ↑ "Phụ lục kèm theo Thông tư số 25/2014/TT-BTNMT quy định về Bản đồ địa chính". Bộ Tài nguyên và Môi trường. Retrieved 22 November 2022.