1. State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China
2. Department of Geographical Sciences, University of Maryland-College Park, College Park, MD, USA
3. The Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, USA
4. School of Urban Design, Wuhan University, Wuhan, China
5. College of Civil Engineering, Shenzhen University, Shenzhen, China