https://www.cowbun.net/library/pollution/radiation/7-dosesurvey-data-map/12-%e7%a7%8b%e7%94%b0%e7%9c%8c%e7%a7%8b%e7%94%b0%e5%b8%82%e5%b1%b1%e7%8e%8b/