Average GPS coordinates for San Martin Postcode location: 17.938, -91.429. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Martin on map:

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Listing cities & postcodes (1):
>> Tabasco, 86153 San Martin, Centro, Villahermosa, GPS coordinates: 17.9375,-91.4292