Coordinate GPS medie per codice postale 21129: 2.948, 99.057

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lista delle città :
>> Nagahuta 21129, North Sumatra, Pematang Siantar, coordinate GPS: 2.93895,99.04835
>> Simarimbun 21129, North Sumatra, Pematang Siantar, coordinate GPS: 2.95703,99.06476