1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730030, China
2. Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
3. International Research Center of Big Data for Sustainable Development Goals, Beijing 100094, China
4. School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang 222000, China
5. Monitoring Department, Qinghai Eco-Environment Monitoring Center, Xining 810000, China
6. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China