VERT_CS["NIVELLEMENT GENERAL DU LUXEMBOURG",
    VERT_DATUM["NORMAL NULL (NIVELLEMENT GENERAL DU LUXEMBOURG NG-L)",2005,
        AUTHORITY["IGNF","REA109"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["IGNF","NNLUX"]]