State Key Laboratory of Resources and Environmental Information System;
Institute of Geographic Sciencesand Natural Resources Research;
CAS;
Beijing 100101;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application;
Nanjing 210023;
China;
Remote Sensing Monitoring Center of Qinghai Ecology and Environment;
Xining 810007;
China;