Average GPS coordinates for Rocas Postcode location: 41.263, -8.479. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Rocas on map:

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Listing cities & postcodes (2):
>> Porto, 4560-805 Roças, Penalva do Castelo, Vale da Porca, GPS coordinates: 41.3417,-8.425
>> Porto, 4605-157 Rocas, Corvo, Olmos, GPS coordinates: 41.1833,-8.5333