OGC requests comment on candidate standard: Geographic Information — Well Known Text Representation Of Coordinate Reference Systems
New edition is aligned with the coordinate reference systems described in ISO 19111:2018, including dynamic geodetic reference frames, three-dimensional projected coordinate reference systems, datum ensembles, and coordinate metadata.The Open Geospatial Consortium (OGC) seeks public comment on the candidate standard jointly developed by the International Organization for Standardization (ISO) and the Open Geospatial Consortium: “Geographic Information – Well-Known Text representation of coordinate reference systems” (CRS WKT).Specifically the changes from the 2015 edition are:Extension to describe dynamic geodetic and dynamic vertical coordinate reference systems – coordinate reference systems in which coordinate values on the surface of the earth change with time due to tectonic deformation including a time reference (coordinate epoch) for coordinates referenced to a dynamic CRS;Extension to describe geoid-based vertical coordinate reference systems;Extension for the description of datum ensembles, groups of realizations of one terrestrial or vertical reference system that for low accuracy purposes may be merged ignoring coordinate transformation;A rigorous description of temporal coordinate reference systems;The removal (deprecation) of image coordinate reference systems; andThe remodelling of scope and extent information.The candidate CRS WKT standard was prepared by the OGC CRS Standards Working Group and Technical Committee ISO/TC 211 Geographic information/Geomatics.The candidate Well Known Text Representation of Coordinate Reference Systems standard is available for review and comment on the OGC Portal.