1. Faculty of Engineering, Beidou Research Institute, South China Normal University, Foshan, China
2. State Key Laboratory of Geo-Information Engineering, Xi’an, China
3. GeoSpatialX Lab, Geography Department, National University of Singapore, Singapore, Singapore
4. School of Computer Science, China University of Geosciences, Wuhan, China
5. National Engineering Research Center of Geographic Information System, Wuhan, China
6. Guangdong-Hong Kong-Macau Joint Laboratory for Smart Cities, Shenzhen, China
7. School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore