Average GPS coordinates for Chã Postcode location: 40.901, -8.377. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Chã on map:

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Listing cities & postcodes (3):
>> Aveiro, 3740-107 Chã, Sátão, Bagueixe, GPS coordinates: 40.8389,-8.4542
>> Aveiro, 4540-030 Chã, Povoação, Cicouro, GPS coordinates: 40.8917,-8.3
>> Aveiro, 4540-575 Chã, Povoação, Lamalonga, GPS coordinates: 40.9722,-8.3778