Keskimääräinen GPS-koordinaatit postinumero 331-821: 34.79, 126.7

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Listatut kaupungit:
>> Ipjang-myeon/입장면 331-821, Chungcheongnam-do/충남, Seobuk-gu Cheonan-si/천안시 서북구, Gasanri/가산리, GPS-koordinaatit: 34.79016,126.69966
>> Ipjang-myeon/입장면 331-821, Chungcheongnam-do/충남, Seobuk-gu Cheonan-si/천안시 서북구, Yeongokri/연곡리, GPS-koordinaatit: 34.79016,126.69966
>> Ipjang-myeon/입장면 331-821, Chungcheongnam-do/충남, Seobuk-gu Cheonan-si/천안시 서북구, Yuri/유리, GPS-koordinaatit: 34.79004,126.69954