PROJCRS["Kertau (RSO) / RSO Malaya (ch)",
    BASEGEOGCRS["Kertau (RSO)",
        DATUM["Kertau (RSO)",
            ELLIPSOID["Everest 1830 (RSO 1969)",6377295.664,300.8017,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4751]],
    CONVERSION["Rectified Skew Orthomorphic Malaya Grid (chain)",
        METHOD["Hotine Oblique Mercator (variant A)",
            ID["EPSG",9812]],
        PARAMETER["Latitude of projection centre",4,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8811]],
        PARAMETER["Longitude of projection centre",102.25,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8812]],
        PARAMETER["Azimuth of initial line",323.0257905,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8813]],
        PARAMETER["Angle from Rectified to Skew Grid",323.130102361111,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8814]],
        PARAMETER["Scale factor on initial line",0.99984,
            SCALEUNIT["unity",1],
            ID["EPSG",8815]],
        PARAMETER["False easting",40000,
            LENGTHUNIT["British chain (Sears 1922 truncated)",20.116756],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["British chain (Sears 1922 truncated)",20.116756],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["British chain (Sears 1922 truncated)",20.116756]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["British chain (Sears 1922 truncated)",20.116756]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["Malaysia - West Malaysia onshore."],
        BBOX[1.21,99.59,6.72,104.6]],
    ID["EPSG",3167]]