1. School of Architecture and Urban Planning, Lanzhou Jiaotong University, Lanzhou 730070, China
2. State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China
5. School of Information Systems and Technology, Claremont Graduate University, Claremont, CA 91711, USA
6. Norwich Business School, University of East Anglia, Norwich NR4 7TJ, UK
7. Academy of Forestry Inventory and Planning, National Forestry and Grassland Administration of Republic of China, Beijing 100010, China