PROJCS["Sister Islands National Grid 1961",GEOGCS["SIGD61",DATUM["Sister_Islands_Geodetic_Datum_1961",SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6726"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4726"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-81],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",1640419.9475],PARAMETER["false_northing",0],UNIT["foot",0.3048,AUTHORITY["EPSG","9002"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","6129"]]