{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"BoundCRS","source_crs":{"type":"GeographicCRS","name":"OSGB36","datum":{"type":"GeodeticReferenceFrame","name":"Ordnance Survey of Great Britain 1936","ellipsoid":{"name":"Airy 1830","semi_major_axis":6377563.396,"inverse_flattening":299.3249646}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"id":{"authority":"EPSG","code":4277}},"target_crs":{"type":"GeographicCRS","name":"ETRS89","datum_ensemble":{"name":"European Terrestrial Reference System 1989 ensemble","members":[{"name":"European Terrestrial Reference Frame 1989","id":{"authority":"EPSG","code":1178}},{"name":"European Terrestrial Reference Frame 1990","id":{"authority":"EPSG","code":1179}},{"name":"European Terrestrial Reference Frame 1991","id":{"authority":"EPSG","code":1180}},{"name":"European Terrestrial Reference Frame 1992","id":{"authority":"EPSG","code":1181}},{"name":"European Terrestrial Reference Frame 1993","id":{"authority":"EPSG","code":1182}},{"name":"European Terrestrial Reference Frame 1994","id":{"authority":"EPSG","code":1183}},{"name":"European Terrestrial Reference Frame 1996","id":{"authority":"EPSG","code":1184}},{"name":"European Terrestrial Reference Frame 1997","id":{"authority":"EPSG","code":1185}},{"name":"European Terrestrial Reference Frame 2000","id":{"authority":"EPSG","code":1186}},{"name":"European Terrestrial Reference Frame 2005","id":{"authority":"EPSG","code":1204}},{"name":"European Terrestrial Reference Frame 2014","id":{"authority":"EPSG","code":1206}},{"name":"European Terrestrial Reference Frame 2020","id":{"authority":"EPSG","code":1382}}],"ellipsoid":{"name":"GRS 1980","semi_major_axis":6378137,"inverse_flattening":298.257222101},"accuracy":"0.1","id":{"authority":"EPSG","code":6258}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"id":{"authority":"EPSG","code":4258},"remarks":"Has been realized through ETRF89, ETRF90, ETRF91, ETRF92, ETRF93, ETRF94, ETRF96, ETRF97, ETRF2000, ETRF2005 and ETRF2014. This 'ensemble' covers any or all of these realizations without distinction."},"transformation":{"name":"OSGB36 to ETRS89 (2)","method":{"name":"NTv2","id":{"authority":"EPSG","code":9615}},"parameters":[{"name":"Latitude and longitude difference file","value":"OSTN15_NTv2_OSGBtoETRS.gsb","id":{"authority":"EPSG","code":8656}}],"id":{"authority":"EPSG","code":7709}}}