VERT_CS["REDNAP_height",
    VERT_DATUM["Red_Espanola_de_Nivelacion_de_Alta_Precision",2005,
        AUTHORITY["ESRI","105103"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["ESRI","105603"]]