Average GPS coordinates for Boca Postcode location: 41.209, -8.45. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Boca on map:

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Listing cities & postcodes (3):
>> Porto, 4600-652 Boca, Corvo, Lamas, GPS coordinates: 41.2667,-8.3556
>> Porto, 4615-017 Boca, Corvo, Ferreira, GPS coordinates: 41.1833,-8.5056
>> Porto, 4650-704 Boca, São Roque do Pico, Talhas, GPS coordinates: 41.1778,-8.4889