Gjennomsnittlig GPS-koordinater for postnummer 20157: 3.724, 98.507
Notering byer:
>> Polonia 20157, North Sumatra, Medan, GPS-koordinater: 3.54794,98.67714
>> Sari Rejo 20157, North Sumatra, Medan, GPS-koordinater: 3.81158,98.4226
>> Suka Damai 20157, North Sumatra, Medan, GPS-koordinater: 3.8116,98.42262
Notering byer:
>> Polonia 20157, North Sumatra, Medan, GPS-koordinater: 3.54794,98.67714
>> Sari Rejo 20157, North Sumatra, Medan, GPS-koordinater: 3.81158,98.4226
>> Suka Damai 20157, North Sumatra, Medan, GPS-koordinater: 3.8116,98.42262