1. College of Urban and Environmental Sciences, Northwest University, Xi'an, People’s Republic of China
2. Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Northwest University, Xi'an, People's Republic of China
3. Department of Civil, Construction and Environmental Engineering, University of Alabama System, Tuscaloosa, AL, USA
4. Department of Informatics, Urban Informatics & Spatial Computing Lab, New Jersey Institute of Technology, Newark, NJ, USA