Land boundaries: total: 2,046 km border countries: Algeria 42 km, Mauritania 1,561 km, Morocco 443 km
Coastline: 1,110 km
Maritime claims: contingent upon resolution of sovereignty issue
Climate: hot, dry desert; rain is rare; cold offshore air currents produce fog and heavy dew
Terrain: mostly low, flat desert with large areas of rocky or sandy surfaces rising to small mountains in south and northeast
Elevation extremes: lowest point: Sebjet Tah -55 m highest point: unnamed location 463 m
Natural resources: phosphates, iron ore
Land use: arable land: 19% permanent crops: 24% permanent pastures: 0% forests and woodland: 47% other: 10% (1993 est.)
Irrigated land: NA sq km
Natural hazards: hot, dry, dust/sand-laden sirocco wind can occur during winter and spring; widespread harmattan haze exists 60% of time, often severely restricting visibility