1. School of Civil Engineering, Hefei University of Technology, Hefei, China
2. Intelligent Interconnected Systems Laboratory of Anhui Province (Hefei University of Technology)
3. Institute of Remote Sensing and GIS, Peking University, Hefei, Beijing, China
4. Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Nanjing, China
5. Ministry of Education, Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions (Henan University), Kaifeng, China