1. Associate Professor, Dept. of Civil Engineering, Southeast Univ., Southeast Univ. Rd., Nanjing, Jiangsu 211189, China (corresponding author). ORCID: .
2. Postgraduate Student, Dept. of Civil Engineering, Southeast Univ., Southeast Univ. Rd., Nanjing, Jiangsu 211189, China.
3. Lecturer, Photogrammetry and Remote Sensing, Technical Univ. of Munich, Arcisstr. 21, Munich 80333, Germany.
4. Professor, Photogrammetry and Remote Sensing, Technical Univ. of Munich, Arcisstr. 21, Munich 80333, Germany. ORCID: .