1. School of Earth Sciences, Zhejiang University, Hangzhou, China
2. Zhejiang Provincial Key Laboratory of Geographic Information Science, Hangzhou, China
3. Ocean Academy, Zhejiang University, Zhoushan, China
4. Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, NT, Hong Kong
5. Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, NT, Hong Kong