Coordinate GPS medie per codice postale ha1: 51.577, -0.336
lista delle città :
>> Harrow on the Hill HA1, Middlesex, England, coordinate GPS: 51.5714,-0.3337
>> Greenhill HA1, Middlesex, England, coordinate GPS: 51.5834,-0.3386
lista delle città :
>> Harrow on the Hill HA1, Middlesex, England, coordinate GPS: 51.5714,-0.3337
>> Greenhill HA1, Middlesex, England, coordinate GPS: 51.5834,-0.3386