JSON as an encoding format for geospatial data is becoming increasingly popular over XML. The light weight, simple syntax, and clear human and machine readability of JSON appeals to developers. GeoJSON has become a very popular encoding, but has significant limitations that prevent broad use in more technical circumstances. At a minimum, a more-inclusive JSON encoding for geospatial feature data should:
include the ability to use Coordinate Reference Systems (CRSs) other than WGS84,
support other non-Euclidean metrics, in particular ellipsoidal metrics,
support more geometry types, in particular solids, and
provide guidance on how to represent feature properties in JSON consistent with the General Feature Model, e.g., including temporal properties.
In the future OGC Features and Geometries JSON may be extended include more complex geometries such as curves with non-linear interpolation, time-variant geometry, or geometries based on multiple coordinate reference systems.
Given the popularity of GeoJSON, the SWG will ensure that OGC Features and Geometries JSON will be specified as a superset of GeoJSON so that valid GeoJSON is also valid OGC Features and Geometries JSON.