1. Anhui Engineering Laboratory of Geo-information Smart Sensing and Services, Chuzhou University, Chuzhou, China
2. Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing, China
3. Department of Information Technology and Decision Sciences, Old Dominion University, Norfolk, VA, USA
4. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China
5. Jiangsu Open University, Nanjing, China
6. Nanjing University of Posts and Telecommunications, Nanjing, China
7. Anhui Province Key Laboratory of Physical Geographic Environment, Chuzhou University, Chuzhou, China