Japanese historical geography uses as its historical records the cadastral maps prepared concurrently for the entire nation in the early Meiji period. The data regarding the proprietary rights of land plots continuing since the early Meiji period, as cadastral data is either uninterrupted continuing to the present, or has been revised. The subsequent landscape has been severely damaged, but by putting emphasis on these maps it is possible to reconstruct using maps the pre-disaster landscape even in cases where only a portion remains. By making use of GIS, we plan to engage in confirmations of land plot data and koaza boundaries. Diagrams such as cadastral maps can be utilized through GIS, and our technology is advancing to the point where we can judge their accuracy. Experience of reconstruction work in the areas damaged by the Tohoku earthquake provides planning for the entire nation.
