Prosečne GPS koordinate za poštanski broj 91418-cedex: 48.528, 2.011
Spisak gradova:
>> Dourdan 91418-CEDEX, Île-de-France, Essonne, Arrondissement d'Étampes, GPS koordinate: 48.5277,2.0111
Spisak gradova:
>> Dourdan 91418-CEDEX, Île-de-France, Essonne, Arrondissement d'Étampes, GPS koordinate: 48.5277,2.0111