昔の日本地図で比較すると面白い

1945-1946
http://legacy.lib.utexas.edu/maps/ams/japan_city_plans/
1954-
http://legacy.lib.utexas.edu/maps/ams/japan/japan_ams_clickable_index.html
1980前後
http://legacy.lib.utexas.edu/maps/jog/japan/index_map.html