BOUNDCRS[SOURCECRS[PROJCRS["Astro DOS 71 / SHLG71",BASEGEOGCRS["Astro DOS 71",DATUM["Astro DOS 71",ELLIPSOID["International 1924",6378388,297,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4710]],CONVERSION["St. Helena Local Grid 1971",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",-15.9666666666667,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-5.71666666666667,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",300000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",2000000,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Topographic mapping."],AREA["St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore."],BBOX[-16.08,-5.85,-15.85,-5.59]],ID["EPSG",7877]]],TARGETCRS[GEOGCRS["WGS 84",ENSEMBLE["World Geodetic System 1984 ensemble",MEMBER["World Geodetic System 1984 (Transit)"],MEMBER["World Geodetic System 1984 (G730)"],MEMBER["World Geodetic System 1984 (G873)"],MEMBER["World Geodetic System 1984 (G1150)"],MEMBER["World Geodetic System 1984 (G1674)"],MEMBER["World Geodetic System 1984 (G1762)"],MEMBER["World Geodetic System 1984 (G2139)"],ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ENSEMBLEACCURACY[2.0]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic latitude (Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic longitude (Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],USAGE[SCOPE["Horizontal component of 3D system."],AREA["World."],BBOX[-90,-180,90,180]],ID["EPSG",4326]]],ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84",METHOD["Position Vector transformation (geog2D domain)",ID["EPSG",9606]],PARAMETER["X-axis translation",112.771,ID["EPSG",8605]],PARAMETER["Y-axis translation",-12.282,ID["EPSG",8606]],PARAMETER["Z-axis translation",18.935,ID["EPSG",8607]],PARAMETER["X-axis rotation",-2.1692,ID["EPSG",8608]],PARAMETER["Y-axis rotation",-16.8896,ID["EPSG",8609]],PARAMETER["Z-axis rotation",-17.1961,ID["EPSG",8610]],PARAMETER["Scale difference",1.00001954517,ID["EPSG",8611]]]]