1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang, China
2. University of Chinese Academy of Sciences, Beijing, China
3. Nanjing University of Information Science & Technology, Nanjing, China
4. Department of Computer Vision & Remote Sensing, Technische Universität Berlin, Berlin, Germany
5. CAS Research Center for Ecology and Environment of Central Asia, Urumqi, Xinjiang, China