1. School of Resources and Environmental Engineering, Anhui University, Hefei, China
2. Anhui Province Basic Surveying and Geographic Information Center, Hefei, China
3. Department of Art and Design, Jining Polytechnic, Jining, China
4. School of Artificial Intelligence, Anhui University, Hefei, China
5. Institutes of Physical Science and Information Technology, Anhui University, Hefei, China