Gjennomsnittlig GPS-koordinater for postnummer 350-821: 36.622, 126.742

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Notering byer:
>> Geumma-myeon/금마면 350-821, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Gasanri/가산리, GPS-koordinater: 36.62223,126.74161
>> Geumma-myeon/금마면 350-821, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Hwayangri/송강리, GPS-koordinater: 36.62213,126.74151
>> Geumma-myeon/금마면 350-821, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Insanri/인산리, GPS-koordinater: 36.62211,126.74149
>> Geumma-myeon/금마면 350-821, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Songgangri/화양리, GPS-koordinater: 36.62221,126.74159