1. School of Geography and Information Engineering, China University of Geosciences, Wuhan, People's Republic of China
2. School of Engineering, Newcastle University, Newcastle upon Tyne, UK
3. Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, USA
4. School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
5. National Engineering Research Center of Geographic Information System, China University of Geosciences, Wuhan, People's Republic of China