1. College of Geomatics and Geoinformation, Guilin University of Technology, Guilin, People’s Republic of China
2. Northeast Institute of Geography and Agroecology, CAS, Changchun, People’s Republic of China
3. Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo, People’s Republic of China
4. College of Geography and Environmental Science, Hainan Normal University, Haikou, People’s Republic of China