1. College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
2. Land Surveying and Mapping Institute of Shandong Province, Jinan 250102, China
3. Shandong Province Engineering Technology Research Center for Spatial Information and Big Data Applications, Jinan 250102, China
4. School of Earth Sciences, Zhejiang University, Hangzhou 310058, China
5. College of Mathematics and Computer Science, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China
6. Ocean Academy, Zhejiang University, Zhoushan 316021, China
7. College of Computer Science and Technology, Zhejiang University, Hangzhou 310063, China
8. Financial Big Data Research Institute, Sunyard Technology Co., Ltd., Hangzhou 310053, China