Average GPS coordinates for Chã Postcode location: 40.667, -8.083. (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):
>> Viseu, 3670-042 Chã, Vouzela, Cicouro, GPS coordinates: 40.6833,-8.1667
>> Viseu, 4690-215 Chá, Povoação, Mazouco, GPS coordinates: 40.5167,-8.1833
>> Viseu, 5120-283 Chã, Tabuaço, Corujas, GPS coordinates: 40.8,-7.9