Mapping from CF Grid Mapping Attributes to CRS WKT Elements

These provisional mappings have been compiled to support, among other things, CF proposals 69 and 80; which have been incorporated in the CF Conventions document version 1.7. If you spot any errors or omissions, please email the authors (Phil Bentley and Etienne Tourigny) or the CF mailing list, or else update this wiki page.

In Tables 1 and 2 the names of WKT PARAMETER elements follow the names of coordinate operation parameters defined in the ​ EPSG geodetic parameter registry.

The following tables list translations of projection parameter names between CF and various other representations (such as OGC WKT, EPSG and PROJ.4). The information was obtained from various sources, including ​http://www.remotesensing.org/geotiff/proj_list/ .

The various representations listed are:

CF The CF-1.6 (and possibly CF-1.7) parameter names
OGC WKT The names following OGC WKT specification (used by GDAL/OGR and CadCorp?)
PROJ.4 The names used in the PROJ.4 software (​http://trac.osgeo.org/proj/)
EPSG The names and codes used in the EPSG Geodetic Parameter Dataset (​http://www.epsg.org/ and ​http://www.epsg-registry.org/)
GeoTIFF ID The names used in the GeoTIFF raster format (​http://trac.osgeo.org/geotiff/)

The following files are provided to list the various possible Datum, Ellipsoid and Prime Meridian names (in support of CF proposal 80)

horiz_datum.csv - horizontal datum parameters for use as reference for CF-1.7 (source: GDAL/OGR, modified by Etienne Tourigny)
ellipsoid.csv - Ellipsoid parameters from the EPSG database (source: GDAL/OGR)
prime_meridian.csv - Prime Meridian parameters from the EPSG database (source: GDAL/OGR)