1. School of geography and Ocean Science, Nanjing University, Nanjing, China
2. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
3. University of Chinese Academy of Sciences, Beijing, China
4. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
5. Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources of China, Nanjing, China