1. Ph.D. Candidate, College of Surveying and Geo-Informatics, Tongji Univ., Shanghai 200092, PR China.
2. Professor, College of Surveying and Geo-Informatics, Tongji Univ., Shanghai 200092, PR China (corresponding author).
3. Professor, Dept. of Control Science and Engineering, Tongji Univ., Shanghai 201804, PR China.
4. Senior Engineer, Survey, Design, and Research Institute, Shanghai Urban Construction Design and Research Institute, Shanghai 200125, PR China.