{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeodeticCRS","name":"FEH2010","datum":{"type":"GeodeticReferenceFrame","name":"Fehmarnbelt Datum 2010","ellipsoid":{"name":"GRS 1980","semi_major_axis":6378137,"inverse_flattening":298.257222101}},"coordinate_system":{"subtype":"Cartesian","axis":[{"name":"Geocentric X","abbreviation":"X","direction":"geocentricX","unit":"metre"},{"name":"Geocentric Y","abbreviation":"Y","direction":"geocentricY","unit":"metre"},{"name":"Geocentric Z","abbreviation":"Z","direction":"geocentricZ","unit":"metre"}]},"scope":"Engineering survey and construction for Fehmarnbelt tunnel.","area":"Fehmarnbelt area of Denmark and Germany.","bbox":{"south_latitude":54.33,"west_longitude":10.66,"north_latitude":54.83,"east_longitude":12.01},"id":{"authority":"EPSG","code":5591},"remarks":"Trans-national system created due to small (but unacceptable for engineering tolerance) differences between the German and Danish realisations of ETRS89."}