VERT_CS["Lao_1997",VERT_DATUM["D_Lao_National_Datum_1997",2002,AUTHORITY["ESRI","from_geogdatum_EPSG_6678"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Ellipsoidal height",UP],AUTHORITY["ESRI","115743"]]