Average GPS coordinates for San Diego Postcode location: 28.05, -100.583. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). San Diego on map:

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Listing cities & postcodes (2):
>> Chiapas, 29270 San Diego, San Cristobal de las Casas, San Cristobal de las Casas, GPS coordinates: 28.05,-100.5833
>> Chiapas, 30162 San Diego, La Trinitaria, GPS coordinates: 28.05,-100.5833