Average GPS coordinates for San Mateo Postcode location: 0.888, -79.635. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Mateo on map:

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Listing cities & postcodes (1):
>> Esmeraldas, 080163 San Mateo, Esmeraldas, GPS coordinates: 0.88760, -79.63477