1. Department of Earth Observation Science, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, The Netherlands
2. College of Civil Engineering, Nanjing Forestry University, Nanjing, China
3. Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education, Academy of Digital China (Fujian), Fuzhou University, Fuzhou, China
4. School of Geography, South China Normal University, Guangzhou, China