Hiroyuki Yamauchi¹, Takuro Ogura², Sakie Sumikawa³, Satoshi Asano⁴, Takashi Oguchi¹ and Ikuru Ishibashi⁵, (1)The University of Tokyo, Center for Spatial Information Science, Kashiwa, Japan, (2)The University of Tokyo, Graduate School of Frontier Sciences, Kashiwa, Japan, (3)Eizaburo Nishibori Memorial Explorer Museum, Higashiomi, Japan, (4)Kyoto University, Graduate School of Global Environmental Studies, Kyoto, Japan, (5)Toin Gakuen High School, Yokohama, Japan