1. Guangxi Key Laboratory of Spatial Information and Geomatics, the College of Earth Sciences, the College of Geomatics and Geoinformation, and the College of Information Science and Engineering, Guilin University of Technology, Guilin, China
2. College of Information Science and Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, China
3. College of Machanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, China