1. School of Geomatics and Urban Spatial Informatics, Beijing University of Civil Engineering and Architecture, Beijing, People’s Republic of China
2. Key Laboratory of Urban Spatial Information, Ministry of Natural Resources, Beijing, People’s Republic of China
3. Key Laboratory of Digital Earth Science, Chinese Academy of Sciences, Aerospace Information Research Institute, Beijing, People’s Republic of China
4. State Key Laboratory of Resources and Environmental Information System, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, Beijing, People’s Republic of China
5. School of Architecture and Urban Planning, Beijing University of Civil Engineering and Architecture, Beijing, People’s Republic of China