Keskmine GPS koordinaadid postiindeks 356-850: 36.839, 126.469
videod linnad:
>> Seongyeon-myeon/성연면 356-850, Chungcheongnam-do/충남, Seosan-si/서산시, GPS koordinaadid: 36.83852,126.46885
videod linnad:
>> Seongyeon-myeon/성연면 356-850, Chungcheongnam-do/충남, Seosan-si/서산시, GPS koordinaadid: 36.83852,126.46885