1. School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, China
2. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, China
3. School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China
4. School of Earth Science, Zhejiang University, Hangzhou, China