[1] Chinese Acad Sci, Aerosp Informat Res Inst, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Inst Fundamental Res & Studies, Kathmandu 44600, Nepal
[4] Tribhuvan Univ, Cent Dept Geog, Kathmandu 44613, Nepal
[5] Univ Bergen, Dept Geog, POB 78005020, Bergen, Norway