The purpose of this study is to consider the regional characteristics of new and old central urban districts in Yangsan City in terms of land use composition and its temporal change. For this purpose, area composition ratio and average area by land use category were analyzed quantitatively. Then, the area and spatial distribution of the lots that land use has changed were clarified. The result of this study is summarized as follows. Buildings in the new central urban district are much larger than those in the old central urban district, but average area of land use lots in the new central urban district are smaller than the old central urban district. While the spatial distribution of the land use change has no clear regional trend, land use change in the old central urban district has occurred twice as large area as the new central urban district.

Japan is a disaster-prone country with electric-poles distributed along most roads. The natural disasters such as typhoons, tornados and earthquakes may make electric-poles collapsed and thus closing the roads. Although electric-pole removal projects have been promoted on emergency transportation roads, route selection avoiding poles is required for secure of transportation when disaster happens. In this study, we characterize the location of electric-poles in Ibaraki prefecture of Japan by using regression models, and derived the Pareto-optimal route in geographical space. Besides, we evaluated the effect of electric-pole removal projects in emergency transportation roads with electric-pole position data in Ibaraki. Finally, we studied the basic features of the trade-off curves generated with shortest distance route and minimum existing poles route with a simple model of radial ring city.

In order to fulfill the purpose of logistic support for transporting commodities from Kagawa to other prefectures in Shikoku at the catastrophe, the characteristics of an existing emergency routes were clarified. Morever, alternative route selections to avoid the tsunami, landslide and liquefaction of the ground damage caused by the Nankai metathrust earthquakes were examined, and it revealed the disater risks included in the selected route quantitatively. In mountain areas, the necessity to develop the widely-enough roads which are expected to be transported by the large trucks was indicated because current road network has narrow parts intermittently. From the route selection results under multiple scenarios, the importance of considering by comprehensively judging the relationship among ensuring safety, extending the total distance to the destination and making a decision were indicated in case of emergency response.

Although multi-municipal cooperation is promoted in Japan, it is affected by the geography of adjacent municipalities. Therefore, the purpose of this article is to analyze what affects adjacent municipalities that arises in a triangulating planar graph and to grasp the progress of the multi-municipal cooperation projects in Japan. We derive the rate of edges and facets crossing borders by use of Euler's polyhedron theorem in a planar graph. In addition, we examine how prefectural borders inhibit the multi-municipal cooperation projects of regional revitalization grant.

Around the time of the high economic growth period, the road maintenance and construction were commenced in Japan's cities, which performed as the execution of land readjustment projects for the progress of motorization and disaster prevention. Conversely, precincts surrounding buildings with large sites, such as a shrine, were subject to extensions and declines in the freedom degree of the construction plans, thus leading to difficulties in the projects. The purpose of this study is to examine the effect of road maintenance and construction on the existing site by both theoretical and empirical analysis. To start with, we use the random strip to develop a model for calculating the expected value at which the roads intersect the building site. Subsequently, we apply the model to data on actual roads and shrines in Nagoya.

In this paper, through my experience of supporting the use of GLAM data in digital archives, I discussed the necessity and the methods of preserving and utilizing GLAM data by integrating geospatial information and GLAM data from the standpoint of geospatial information. In the future, GLAM data, including Japan Search, will require the development and refinement of location information metadata by GLAM institutions, the field of geographic information science, and citizen participation, such as the transfer of geocoding methods from addresses and the development of a WebGIS mechanism that allows location information metadata assignment. On the side of geographic information science, it is necessary to organize and provide bone digital geospatial information in terms of digital archiving.