Coordinate reference system

Coordinates in the OFDS data model must be specified in the coordinate reference system (CRS) required by GeoJSON:

The coordinate reference system for all GeoJSON coordinates is a geographic coordinate reference system, using the World Geodetic System 1984 WGS 84 datum, with longitude and latitude units of decimal degrees. This is equivalent to the coordinate reference system identified by the Open Geospatial Consortium (OGC) URN urn:ogc:def:crs:OGC::CRS84.

The CRS is referenced by the network-level crs/name and crs/uri properties, which must be set to the following values:

• name: urn:ogc:def:crs:OGC::CRS84

• uri: http://www.opengis.net/def/crs/OGC/1.3/CRS84

urn:ogc:def:crs:OGC::CRS84 denotes WGS84 with the order longitude, latitude. It is equivalent to EPSG:4326 with reversed axes.

For more information, see How to transform coordinates to the correct coordinate reference system.