1. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China
2. College of Resources and Environment, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
3. German Remote Sensing Data Center, DFD, German Earth Observation Center, DLR, Oberpfaffenhofen, 82234 Wessling, Germany
4. College of Information Science and Engineering, Shandong Agricultural University, Tai’an, Shandong Province 271018, China