1. Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, China
2. Department of Surveying and Geo-Informatics, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
3. School of Earth Sciences and Engineering, Hohai University, Nanjing, China
4. Institute of Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, China
5. UNESCO International Center for Natural and Cultural Heritage Space Technology (HIST) and the Nanchang Sub-Center, Jiangxi Normal University, Nanchang, China