Dinh Ho Tong Minh, INRAE, France; Trung Chon Le, Ho Chi Minh city University of Technology, Viet Nam; Yen-Nhi Ngo, INRAE, France; Cam Chi Nguyen, Department of Survey, Mapping and Geographic Information, Viet Nam; Thanh An Pham, Defense Mapping Agency, Viet Nam; Thuy Le Toan, Centre d'Etudes Spatiales de la Biosphère, CESBIO, Viet Nam