Keskmine GPS koordinaadid postiindeks cm20: 51.779, 0.097

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videod linnad:
>> Little Parndon CM20, Essex, England, GPS koordinaadid: 51.7751,0.1025
>> Gilston Park CM20, Essex, England, GPS koordinaadid: 51.7751,0.1025
>> Eastwick CM20, Essex, England, GPS koordinaadid: 51.7878,0.085