1. Chinese Academy of Sciences, Institute of Remote Sensing and Digital Earth, Key Laboratory of Digital Earth Science, No. 9 Dengzhuang South Road, Beijing 100094, China
2. University of South Florida, School of Geosciences, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
3. University of Extremadura, Hyperspectral Computing Laboratory, Department of Technology of Computers and Communications, Avda. de la Universidad S/N, Cáceres 10071, Spain
4. Sun Yat-sen University, School of Geography and Planning, No. 135 Xingang Xi Road, Guangzhou 510275, China