Average GPS coordinates for San Martin Postcode location: 16.732, -96.304. (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):
>> Oaxaca, 68430 San Martin, San Miguel Soyaltepec, GPS coordinates: 17.65,-96.6333
>> Oaxaca, 70680 San Martin, Salina Cruz, Salina Cruz, GPS coordinates: 16.5667,-94.9667
>> Oaxaca, 70902 San Martin, San Pedro Pochutla, GPS coordinates: 15.9803,-97.3111