1 Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong SAR, Kowloon, China.
2 Key Laboratory of Virtual Geographic Environment (Ministry of Education of PRC), Nanjing Normal University, Nanjing 210023, China.
3 Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China.
4 The French Naval Academy Research Institute, 29240 Lanveoc-Poulmic, France.
5 The Bartlett Centre for Advanced Spatial Analysis (CASA), University College London (UCL), WC1E 6BT London, UK.
6 Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong SAR, Shatin 999077, China.
7 Department of Civil Engineering, Cairo University, 12613 Cairo, Egypt.
8 SpaceTimeLab, Department of Civil, Environmental and Geomatic Engineering, University College London (UCL), WC1E 6BT London, UK.
9 Department of Geoinformatics, University of Salzburg, 5020 Salzburg, Austria.
10 Institute of Interactive Technologies (IIT), University of Applied Sciences and Arts Northwestern Switzerland FHNW, 5210 Windisch, Switzerland.
11 Spatial Sciences Institute, University of Southern California, Los Angeles, CA 90007, USA.
12 Laboratory on Cartography, Department of Photogrammetry and Cartography, University of Architecture, Civil Engineering and Geodesy, 1164 Sofia, Bulgaria.
13 Laboratory on Geoinformatics and Cartography, Department of Geography, Masaryk University, 61137 Brno, Česká Republika.
14 Computer Science and Engineering, Tandon School & Center for Urban Science + Progress, New York University, New York, NY 10012, USA.
15 School of Humanities and Social Science, Xi'an Jiaotong University, Xi'an 710049, China.
16 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
17 Department of Urban Studies and Planning, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
18 Centre for Environmental Research, Helmholtz Centre for Environmental Research-UFZ, 04318 Leipzig, Germany.
19 Laboratory of Geo-information Science and Remote Sensing, Wageningen University & Research, Wageningen 6708, the Netherlands.
20 Department of Civil Engineering, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada.
21 School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China.