1. School of Land Science and Technology, China University of Geosciences , Beijing, China
2. Department of Geosciences, University of Padua , Padua, Italy
3. Shanxi Key Laboratory of Resources, Environment and Disaster Monitoring , Jinzhong, China
4. Department of Geodesy, Section of Remote Sensing, GFZ German Research Centre for Geosciences , Potsdam, Germany
5. Institute for Photogrammetry and GeoInformation, Leibniz University Hannover , Hannover, Germany
6. Photogrammetry and Remote Sensing Department, Beijing Institute of Surveying and Mapping , Beijing, China
7. College of Resources and Civil Engineering, Northeastern University , Shenyang, China