Gjennomsnittlig GPS-koordinater for postnummer ha1: 51.577, -0.336
Notering byer:
>> Harrow on the Hill HA1, Middlesex, England, GPS-koordinater: 51.5714,-0.3337
>> Greenhill HA1, Middlesex, England, GPS-koordinater: 51.5834,-0.3386
Notering byer:
>> Harrow on the Hill HA1, Middlesex, England, GPS-koordinater: 51.5714,-0.3337
>> Greenhill HA1, Middlesex, England, GPS-koordinater: 51.5834,-0.3386