1. College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing, China
2. Key Laboratory of Spatial-temporal Big Data Analysis and Application of Natural Resources in Megacities, MNR, Shanghai Surveying and Mapping Institute, Shanghai, China
3. Institute of Remote Sensing and GIS, Peking University, Beijing, China
4. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China