1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China
2. School of Geography and Information Engineering, China University of Geosciences, Wuhan, China
3. National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan, China
4. Guangdong Key Laboratory of Urban Informatics, Shenzhen University, Shenzhen, China