PROJCS["AGD_1984_AMG_Zone_50",GEOGCS["GCS_Australian_1984",DATUM["D_Australian_1984",SPHEROID["Australian",6378160.0,298.25],EXTENSION["PROJ4_GRIDS","National 84 (02.07.01).gsb"]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",117.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]