Prosečne GPS koordinate za poštanski broj 487-811: 37.84, 127.174
Spisak gradova:
>> Gasan-myeon/가산면 487-811, Gyeonggi-do/경기, Pocheon-si/포천시, Gasanri/가산리, GPS koordinate: 37.83988,127.17403
Spisak gradova:
>> Gasan-myeon/가산면 487-811, Gyeonggi-do/경기, Pocheon-si/포천시, Gasanri/가산리, GPS koordinate: 37.83988,127.17403