The Great East Japan Earthquake, which took place in East Japan area on the 11 March 2011, had a broad impact on land and infrastructure as well as human life. City Bureau, MLIT, Japan has made a survey of the tsunami damage for the local government systematically and comprehensively. This study develops data archiving of this survey result using various open source GIS, in order to keep raw data including GIS data available, as well as report document. This data archive has about 1,000 registered users and 114,000 files that totally amounts to 200GByte, such as tsunami flood area data, building damage status data including photo, evacuation movement data, etc. Finally, We analyze data usage based on their submitted application objectives for their enhanced usage in the future.

We developed a new spatial dataset called “Commercial Accumulation Statistics”. It includes polygon data which represent location, shape, and scale (the number of shops) of commercial areas throughout Japan. First, we developed environment of data development of the Commercial Accumulation Statistics, and completed data development of the entire Japan. Secondly, we verified the reliability through cross-checking with existing statistical data. It led to a conclusion that the data is consistent enough with the existing statistics to monitor the distributions and scales of commercial areas in all prefectures. Finally, data delivery environment was developed to allow researchers to use it for research purposes.

This study is intended to analyze water supply-demand potential in Japanese major 109 river basins and to discuss the regional characteristics in terms of the temporal change of the potential. Mesh dataset is prepared for the analysis of this study, which consists of watershed boundary data, population, the number of manufacturing establishments, land use and precipitation. With the dataset, this study tries to estimate total water demand and the amount of available water resources by the major river basin. In conclusion, geographical backgrounds specifying water supply-demand potential in a river basin have some regional patterns. River basins with relatively high water supply-demand ratio are widely distributed around the country, and the specifying factors are regionally diverse.