Map showing Taoudenni, a remote salt mining centre in the desert region of northern Mali, with towns of 1st, 2nd, 3rd and 4th importance, native villages, international, international undemarcated, intercolonial or mandate, provincial and district boundaries, rivers with falls, nonperennial rivers, canals, lakes, salt lakes, low ground liable to temporary flood, marsh, ground liable to flooding, oasis, sandy desert, contours, formlines, railways, railways under construction, metalled roads 1st class, all weather motor roads, seasonal roads, other tracks paths or explorers routes, telegraph and telephone lines, telegraph and telephone lines along roads and tracks, post offices and post offices with telegraphs or telephones, wireless telegraph stations, Minarets, mosques, fortified houses, lighthouses, ruins, waterpoints: wells and pools, mines and quarries, trig points, heights in metres, depths in metres. Relief shown by form lines, shading and hachures, certain co-ordinates highlighted in blue, Colour. 2nd edition. "Ground/air." Scale 1: 1 000 000.