Prosečne GPS koordinate za poštanski broj 690-809: 33.511, 126.521

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Spisak gradova:
>> Samdo 2(i)-dong/삼도2동 690-809, Jeju-do/제주, Jeju-si/제주시, 1227-1241/1227-1241, GPS koordinate: 33.51056,126.52097
>> Samdo 2(i)-dong/삼도2동 690-809, Jeju-do/제주, Jeju-si/제주시, 57-270/57-270, GPS koordinate: 33.51052,126.52093
>> Samdo 2(i)-dong/삼도2동 690-809, Jeju-do/제주, Jeju-si/제주시, 789-858/789-858, GPS koordinate: 33.51057,126.52098
>> Samdo 2(i)-dong/삼도2동 690-809, Jeju-do/제주, Jeju-si/제주시, 900-982/900-982, GPS koordinate: 33.5106,126.52101