Average GPS coordinates for Harnham Postcode location: 51.102, -1.875. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Harnham on map:

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Listing cities & postcodes (1):
>> Wiltshire, SP2 Harnham, England, GPS coordinates: 51.1016,-1.8753