1. a State Key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing , 100101 , China
2. b LSIIT, UdS, CNRS , 67412 , Illkirch , France
3. c Graduate University of Chinese Academy of Sciences , Beijing , 100049 , China
4. d Academy of Opto-Electronics, Chinese Academy of Sciences , Beijing , 100190 , China
5. e Centre for Space and Remote Sensing Research, National Central University , Chung-Li , Taoyuan , 320 , Taiwan
6. f Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research , Beijing , 100101 , China