Gjennomsnittlig GPS-koordinater for postnummer 28304-cedex: 48.45, 1.456
Notering byer:
>> Mainvilliers 28304-CEDEX, Centre, Eure-et-Loir, Arrondissement de Chartres, GPS-koordinater: 48.45,1.4561
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>> Mainvilliers 28304-CEDEX, Centre, Eure-et-Loir, Arrondissement de Chartres, GPS-koordinater: 48.45,1.4561