1. Institute for Global Innovation and Development, East China Normal University, Shanghai, China
2. School of Urban and Regional Science, East China Normal University, Shanghai, China
3. Faculty of Geosciences and Environmental Engineering & State-Province Joint Engineering Laboratory in Spatial Information Technology for High-Speed Railway Safety, Southwest Jiaotong University, Chengdu, Sichuan, China
4. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Kowloon, Hong Kong