Prosečne GPS koordinate za poštanski broj 631-840: 35.093, 128.58
Spisak gradova:
>> Gusan-myeon/구산면 631-840, Gyeongsangnam-do/경남, Masan-si/마산시, GPS koordinate: 35.09322,128.57951
Spisak gradova:
>> Gusan-myeon/구산면 631-840, Gyeongsangnam-do/경남, Masan-si/마산시, GPS koordinate: 35.09322,128.57951