*Yong Xue^1,2、She L^1,4、Mei L³、Guang J³、Che Y^1,4、Fan C^1,4、Xie Y^1,4 (1.RADI Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences、2.Department of Electronics, Computing and Mathematics, College of Engineering and Technology, University of Derby、3.Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences、4.University of Chinese Academy of Sciences)