Average GPS coordinates for Chalma Postcode location: 18.917, -99.433. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Chalma on map:

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Listing cities & postcodes (1):
>> Mexico, 52460 Chalma, Malinalco, GPS coordinates: 18.9167,-99.4333