Request types that WMS providers may optionally support include: Parameters include: width and height of the map, coordinate reference system, rendering style, image format
WMS specifies a number of different request types, two of which are required by any WMS server: The OGC released WMS version 1.3.0 in January 2004.
The Open Geospatial Consortium released WMS version 1.0.0 in April 2000, followed by version 1.1.0 in June 2001, and version 1.1.1 in January 2002. The Open Geospatial Consortium (OGC) became involved in developing standards for web mapping after a paper was published in 1997 by Allan Doyle, outlining a 'Results of the pilot projects were demonstrated in September 1999, and a second phase of pilot projects ended in April 2000.
