{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"CompoundCRS","name":"RGF93 v2 + NGF-IGN69 height","components":[{"type":"GeographicCRS","name":"RGF93 v2","datum":{"type":"GeodeticReferenceFrame","name":"Reseau Geodesique Francais 1993 v2","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 RGF93 v1 (CRS code 4171) from 2010-06-18. Replaced by 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-IGN69 height","datum":{"type":"VerticalReferenceFrame","name":"Nivellement General de la France - IGN69"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Gravity-related height","abbreviation":"H","direction":"up","unit":"metre"}]}}],"scope":"Spatial referencing.","area":"France - mainland onshore.","bbox":{"south_latitude":42.33,"west_longitude":-4.87,"north_latitude":51.14,"east_longitude":8.23},"id":{"authority":"EPSG","code":9538}}