Keskmine GPS koordinaadid postiindeks 356-835: 36.769, 126.626

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videod linnad:
>> Unsan-myeon/운산면 356-835, Chungcheongnam-do/충남, Seosan-si/서산시, Gopungri/고풍리, GPS koordinaadid: 36.76889,126.62566
>> Unsan-myeon/운산면 356-835, Chungcheongnam-do/충남, Seosan-si/서산시, Wauri/와우리, GPS koordinaadid: 36.76886,126.62563
>> Unsan-myeon/운산면 356-835, Chungcheongnam-do/충남, Seosan-si/서산시, Wonpyeongri/원평리, GPS koordinaadid: 36.76875,126.62552