*Tian Chang^1,2,3、Yonghong Yi^1,2、Masato Furuya⁴ (1.Center for Spatial Information Science and Sustainable Development, Tongji University, Shanghai, China、2.College of Surveying and Geo-Informatics, Tongji University, Shanghai, China、3.Graduate School of Science, Hokkaido University, Sapporo, Japan、4.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan)