Gjennomsnittlig GPS-koordinater for postnummer 91870: 48.479, 2.09
Notering byer:
>> Boissy-le-Sec 91870, Île-de-France, Essonne, Arrondissement d'Étampes, GPS-koordinater: 48.4786,2.09
Notering byer:
>> Boissy-le-Sec 91870, Île-de-France, Essonne, Arrondissement d'Étampes, GPS-koordinater: 48.4786,2.09