1. School of Geographic Science and Remote Sensing, Guangzhou University, Guangzhou, China
2. Department of Geomatics Engineering, University of Calgary, Calgary, AB, Canada
3. School of Geography and Remote Sensing, and MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, Guangzhou University, Guangzhou, China
4. School of Geography and Remote Sensing, Guangzhou University, Guangzhou, China