Gjennomsnittlig GPS-koordinater for postnummer 20987: 3.645, 98.982
Notering byer:
>> Pantai Cermin 20987, North Sumatra, Serdang Bedagai, GPS-koordinater: 3.64514,98.98204
Notering byer:
>> Pantai Cermin 20987, North Sumatra, Serdang Bedagai, GPS-koordinater: 3.64514,98.98204