1. School of Resource and Environmental Sciences, Wuhan University, Wuhan, China
2. Key Laboratory of Geographic Information Systems, Ministry of Education, Wuhan University, Wuhan, China
3. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, China
4. Guangdong Provincial Department of Natural Resources, Land and Resources Technology Center, Guangzhou, China
5. Research Center of Geospatial Big Data Application, Chinese Academy of Surveying and Mapping, Beijing, China