In general, it is understood that a city development is its space expansion. In this study, we make some Potential Contour Maps using land street price. These maps show a variety of land use in a city. We considered close relationship between the contour map and urban facilities, that is river, canal, railway, highway and so on. Through analyzing our maps, we find some characteristics. For instance, in Sapporo, The Sosei River flows through the eastern part of the city center and JR (Japan Reilway Company) Hakodate main line passes through the northern part of it. The existences of the river and the railway transform the frame of contour lines on the map of Sapporo. And in the other cities, Sendai, Hiroshima, and Fukuoka city, They particularly depend on the rivers. In fact, the city center of Sapporo spread toward a direction to which the river flows and where Contour line trasformed. Consequently we were able to recognize availavility of potential maps and the river decided the contour lines.