{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"DHDN","datum":{"type":"GeodeticReferenceFrame","name":"Deutsches Hauptdreiecksnetz","ellipsoid":{"name":"Bessel 1841","semi_major_axis":6377397.155,"inverse_flattening":299.1528128}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"scope":"Geodesy.","area":"Germany - states of former West Germany onshore - Baden-Wurtemberg, Bayern, Bremen, Hamburg, Hessen, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Saarland, Schleswig-Holstein.","bbox":{"south_latitude":47.27,"west_longitude":5.86,"north_latitude":55.09,"east_longitude":13.84},"id":{"authority":"EPSG","code":4314},"remarks":"See also RD/83 for Saxony and PD/83 for Thuringen. For national digital cartographic purposes used across all German states."}