Map showing Ouadane, a small town in the desert region of central Mauritania, with towns of 1st, 2nd, 3rd and 4th importance, native villages, boundaries international, international undemarcated, intercolonial or mandate, provincial, district, 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 and hachures, certain co-ordinates highlighted in blue, Colour. 3rd edition. "Ground/air." Scale 1: 1 000 000.