Average GPS coordinates for Trnova Postcode location: 42.811, 17.865. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Trnova on map:

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Listing cities & postcodes (1):
>> Dubrovačko-Neretvanska, 20232 Trnova, Slano, GPS coordinates: 42.8106,17.865