Coordinate GPS medie per codice postale 91400: 48.7, 2.162

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lista delle città :
>> Gometz-la-Ville 91400, Île-de-France, Essonne, Arrondissement de Palaiseau, coordinate GPS: 48.6722,2.1287
>> Orsay 91400, Île-de-France, Essonne, Arrondissement de Palaiseau, coordinate GPS: 48.6957,2.1873
>> Saclay 91400, Île-de-France, Essonne, Arrondissement de Palaiseau, coordinate GPS: 48.7326,2.1692