1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China
2. Department of Photogrammetry and Remote Sensing, Geomatics Engineering Faculty, K. N. Toosi University of Technology, Tehran, Iran
3. 3D Optical Metrology Unit, Bruno Kessler Foundation, Trento, Italy
4. Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON, Canada