{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"ProjectedCRS","name":"NAD83 / BLM 18N (ftUS)","base_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},"remarks":"Longitude is POSITIVE EAST. The adjustment included connections to Greenland and Mexico but the system was not adopted there. For applications with an accuracy of better than 1m replaced by NAD83(HARN) in the US and PRVI and by NAD83(CSRS) in Canada."},"conversion":{"name":"BLM zone 18N (US survey foot)","method":{"name":"Transverse Mercator","id":{"authority":"EPSG","code":9807}},"parameters":[{"name":"Latitude of natural origin","value":0,"unit":"degree","id":{"authority":"EPSG","code":8801}},{"name":"Longitude of natural origin","value":-75,"unit":"degree","id":{"authority":"EPSG","code":8802}},{"name":"Scale factor at natural origin","value":0.9996,"unit":"unity","id":{"authority":"EPSG","code":8805}},{"name":"False easting","value":1640416.67,"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}}]},"scope":"No official usage.","area":"United States (USA) - between 78°W and 72°W onshore and offshore - Connecticut; Delaware; Maryland; Massachusetts; New Hampshire; New Jersey; New York; North Carolina; Pennsylvania; Virginia; Vermont.","bbox":{"south_latitude":28.28,"west_longitude":-78,"north_latitude":45.03,"east_longitude":-72},"id":{"authority":"EPSG","code":4438}}