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http://www.mlit.go.jp/kankocho/kankorikkoku/kihonhou.html
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4. Aoyama, T., Ichii, T., Murakami, M., Hisada, Y.: WebGIS used in Normal and Disaster Situations for Sightseeing Spot: Application for the ITO in IZU Peninsula. In: Summaries of Technical Papers of the Annual Meeting of the Architectural Institute of Japan, pp. 491–492 (2006) (in Japanese)