Gjennomsnittlig GPS-koordinater for postnummer 79121: 0.913, 108.988
Notering byer:
>> Tengah 79121, West Kalimantan, Singkawang, GPS-koordinater: 0.91285,108.98775
Notering byer:
>> Tengah 79121, West Kalimantan, Singkawang, GPS-koordinater: 0.91285,108.98775