{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"CompoundCRS","name":"ETRS89-FRA [RGF93 v2] + NGF-IGN78 height","components":[{"type":"GeographicCRS","name":"ETRS89-FRA [RGF93 v2]","datum":{"type":"GeodeticReferenceFrame","name":"Reseau Geodesique Francais 1993 v2","anchor_epoch":2009,"ellipsoid":{"name":"GRS 1980","semi_major_axis":6378137,"inverse_flattening":298.257222101}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"remarks":"Replaces ETRS89-FRA [RGF93 v1] (CRS code 4171) from 2010-06-18. Replaced by ETRS89-FRA [RGF93 v2b] (CRS code 9782) from 2021-01-05. See CRS code 9779 for alternate system with axes reversed used by IGN for GIS purposes."},{"type":"VerticalCRS","name":"NGF-IGN78 height","datum":{"type":"VerticalReferenceFrame","name":"Nivellement General de la France - IGN78"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Gravity-related height","abbreviation":"H","direction":"up","unit":"metre"}]}}],"scope":"Spatial referencing.","area":"France - Corsica onshore.","bbox":{"south_latitude":41.31,"west_longitude":8.5,"north_latitude":43.07,"east_longitude":9.63},"id":{"authority":"EPSG","code":9539}}