Gjennomsnittlig GPS-koordinater for postnummer 350-812: 36.556, 126.723

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Notering byer:
>> Hongdong-myeon/홍동면 350-812, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Daeyeongri/금당리, GPS-koordinater: 36.55632,126.72269
>> Hongdong-myeon/홍동면 350-812, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Geumdangri/금평리, GPS-koordinater: 36.55624,126.72261
>> Hongdong-myeon/홍동면 350-812, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Geumpyeongri/대영리, GPS-koordinater: 36.55628,126.72265
>> Hongdong-myeon/홍동면 350-812, Chungcheongnam-do/충남, Hongseong-gun/홍성군, Hyohakri/효학리, GPS-koordinater: 36.55625,126.72262