1. Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou, P. R. China
2. School of Aeronautics and Astronautics, Sun Yat-sen University, Guangzhou, P. R. China
3. Key Lab. Of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, Shanghai, P. R. China
4. Department of Urban Planning and Design, The University of Hong Kong, Hong Kong, P. R. China
5. WEMRC, Department of Civil Engineering, University of Bristol, Bristol, UK