1. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, China
2. Wuhan Geoway Space Information Technology Research Institute Company Ltd., Wuhan, China
3. Inner Mongolia Autonomous Region Department of Land and Resources, Inner Mongolia Autonomous Region Surveying and Mapping Geographic Information Center, Hohhot, China
4. State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China