{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"Ostenfeld-IRF","datum":{"type":"GeodeticReferenceFrame","name":"Ostenfeld  Intermediate Datum","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":"Intermediate stage in transformations - not used otherwise.","area":"Denmark - onshore northern Schleswig and surrounding islands (i.e. Jutland south of the pre-1920 border near the Kongea river).","bbox":{"south_latitude":54.8,"west_longitude":8.37,"north_latitude":55.47,"east_longitude":10.16},"id":{"authority":"EPSG","code":10268},"remarks":"Artificial CRS created in 2022 to assist the transformation of coordinates between the historic Ostenfeld CRS and ETRS89 through transformation ETRS89 to Ostenfeld-IRF (1) (code 10271) used with the Ostenfeld-reconstruction map projection (code 10269)."}