Can a GeoJSON be used to identify a cRSS?
GeoJSON has a general rule that for geodetic CRSs the coordinates always have the order longitude, latitude. CRSs can be identified by a string value (so it is not possible to use designate a CRS reference as a URI). The axis order rule implies that EPSG codes for geodetic CRSs like 4326 (WGS84) or 4258 (ETTRS89) can not be used to identify a CRS.
Is the CRS Uri the same as the WKT string?
A notable feature is that the CRS URI is concatenated with the WKT string in the literal. This design is debatable (see the discussion in this thread in the locadd group). Some arguments against: The CRS is a URI, so it should be published as one. Software libraries that handle WKT geometry do not expect a CRS as start of the string.
Can a EPSG code be used to identify a CRS?
The axis order rule implies that EPSG codes for geodetic CRSs like 4326 (WGS84) or 4258 (ETTRS89) can not be used to identify a CRS. The OGC maintains a registery of CRS URIs at http://www.opengis.net/def/crs.
Which is the coordinate order used in geodetic CRSS?
The fact that geodetic CRSs (CRSs that use degrees longitude and latitude) use the traditional coordinate order latitude-longitude (y,x instead of x,y) in the EPSG definitions has been a continuous source of confusion in GIS.
How is a spatial reference system ( SRS ) defined?
SRS are defined by the OGC ‘s Simple Feature Access standard using well-known text representation of coordinate reference systems. Support has been implemented by several geographic information systems (GIS). SRS can be referred to using a SRID number, including EPSG codes .
Which is srid number is used for SRS?
SRS can be referred to using a SRID number, including EPSG codes . It is specified in ISO 19111:2007 Geographic information—Spatial referencing by coordinates, prepared by ISO/TC 211, also published as OGC Abstract Specification, Topic 2: Spatial referencing by coordinate.