Average GPS coordinates for La Union Chalma Postcode location: 18.975, -100.367. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). La Union Chalma on map:

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Listing cities & postcodes (1):
>> Mexico, 54142 La Union Chalma, Tlalnepantla de Baz, Tlalnepantla de Baz, GPS coordinates: 18.975,-100.3667