抄録
This study developed an image processing technology which was capable of data extraction of the digital information out of topographic maps of analog paper. Applying this technology for the purpose of seismic risk analysis in Sapporo urban area and the suburbia in the time series from 1940s to 1990s, we are able to cultivate an understanding in the field of social geography; with the addition of the comparative analyses of estimated seismic intensity maps of these areas. We are able to propose a safety design of city planning of Sapporo area from the point of view of earthquake engineering.
