{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"BoundCRS","source_crs":{"type":"ProjectedCRS","name":"NAD27 / Michigan Old Central","base_crs":{"type":"GeographicCRS","name":"NAD27","datum":{"type":"GeodeticReferenceFrame","name":"North American Datum 1927","ellipsoid":{"name":"Clarke 1866","semi_major_axis":6378206.4,"semi_minor_axis":6356583.8}},"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":4267}},"conversion":{"name":"Michigan State Plane Old Central zone","method":{"name":"Transverse Mercator","id":{"authority":"EPSG","code":9807}},"parameters":[{"name":"Latitude of natural origin","value":41.5,"unit":"degree","id":{"authority":"EPSG","code":8801}},{"name":"Longitude of natural origin","value":-85.75,"unit":"degree","id":{"authority":"EPSG","code":8802}},{"name":"Scale factor at natural origin","value":0.999909091,"unit":"unity","id":{"authority":"EPSG","code":8805}},{"name":"False easting","value":500000,"unit":{"type":"LinearUnit","name":"US survey foot","conversion_factor":0.304800609601219},"id":{"authority":"EPSG","code":8806}},{"name":"False northing","value":0,"unit":{"type":"LinearUnit","name":"US survey foot","conversion_factor":0.304800609601219},"id":{"authority":"EPSG","code":8807}}]},"coordinate_system":{"subtype":"Cartesian","axis":[{"name":"Easting","abbreviation":"X","direction":"east","unit":{"type":"LinearUnit","name":"US survey foot","conversion_factor":0.304800609601219}},{"name":"Northing","abbreviation":"Y","direction":"north","unit":{"type":"LinearUnit","name":"US survey foot","conversion_factor":0.304800609601219}}]},"id":{"authority":"EPSG","code":5624}},"target_crs":{"type":"GeographicCRS","name":"NAD83","datum":{"type":"GeodeticReferenceFrame","name":"North American Datum 1983","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"}]},"id":{"authority":"EPSG","code":4269}},"transformation":{"name":"NAD27 to NAD83 (7)","method":{"name":"NADCON5 (2D)","id":{"authority":"EPSG","code":1074}},"parameters":[{"name":"Latitude difference file","value":"nadcon5.nad27.nad83_1986.conus.lat.trn.20160901.b","id":{"authority":"EPSG","code":8657}},{"name":"Longitude difference file","value":"nadcon5.nad27.nad83_1986.conus.lon.trn.20160901.b","id":{"authority":"EPSG","code":8658}}],"id":{"authority":"EPSG","code":8555}}}