1. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, People’s Republic of China
2. University of Chinese Academy of Sciences, Beijing, People’s Republic of China
3. School of Computer Science and Information Engineering, Hubei University, Wuhan, People’s Republic of China
4. School of geography and Ocean Science, Nanjing University, Nanjing, People’s Republic of China
5. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, People’s Republic of China
6. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, People’s Republic of China