Fan Wang, College of Geological Engineering and Geomatics, Chang’an University, China; Yong Fang, Xi'an Research Institute of Surveying and Mapping, China
YONG FANG, State Key Laboratory of Geo-Information Engineering, China; Tao Wang, College of Geomatics, Xi'an University of Science and Technology, China; Sen Ma, Zhijie Feng, Jialei Yang, College of Geological Engineering and Geomatics, Chang’an University, China