1. School of Geography and Planning, Sun Yat-Sen University, Guangzhou, China
2. Department of Geography, The University of Hong Kong, Hong Kong, China
3. School of Geography and Environment, Jiangxi Normal University, Nanchang, China
4. School of Architecture and Civil Engineering, Xiamen University, Xiamen, China
5. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou, China