20180718 13023400 1.0 TRUE 20181008 12083100 Water Areas Hydr areas inludes closed reservoir, dam, dry pan, dry water course, estuary, blood bank area, lagoon, lake, marsh, mudflat, non-perennial river, non-perennial pan, open reservoir, perennial pan, perennial river, salt pan, tidal pool, vlei and water tank. National Geo-spatial Information