Average GPS coordinates for San Martin Postcode location: 19.033, -90.563. (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 (3):
>> Campeche, 24330 San Martin, Candelaria, Candelaria, GPS coordinates: 19.5,-89.9083
>> Campeche, 24600 San Martin, Hopelchen, Hopelchen, GPS coordinates: 19.5,-89.9083
>> Campeche, 24903 San Martin, Calkini, Calkini, GPS coordinates: 18.1,-91.8736