ligne de partage des eaux (1) vallée (1) science (1) recherche (1) pression (1) cartographie (cartes) (1) paysage (1) couverture spatiale (SIG) (1) pente (1) traitement de l'image (1) forêt (1) terre agricole (1) vecteur (1) classification (1) Context (1) Parts (1) Article (1) Area (1) Parts (1) Uplands (1) Remote-sensing images (1) Area (1) Valleys (1) Units of measurement (1) Steppes (1) Science (1) Research (1) Pressure (1) Population (1) Performance (1)