ふと見つけたのが今昔マップ。例えばhttp://ktgis.net/kjmapw/kjmapw.html?lat=36.603402&lng=136.660309&zoom=10&dataset=kanazawa&age=0&screen=2&scr1tile=k_cj4&scr2tile=k_cj4&scr3tile=k_cj4&scr4tile=k_cj4&mapOpacity=10&overGSItile=no&altitudeOpac

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