Challenging desertification in West Africa: insights from landsat into carrying capacity, cultivation, and settlement sites in Upper Volta and Niger

aerial surveying colonisation rurale communication technology crops cultivated land cultivos desertification farm area ganado land use livestock plante de culture population density precipitation pueblos recursos del suelo remote sensing ressource en sol rural settlement soil resources soil types surface d'exploitation technique de communication tierras cultivadas tipos de suelos type de sol utilisation des terres vegetation village villages