1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu Province, China
2. Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing, China
3. School of informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA
4. Geospatial Sciences Center of Excellence, South Dakota State University, Brookings, SD, USA
5. Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, MD, USA