Average GPS coordinates for Chian Yai Postcode location: 8.167, 100.15. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Chian Yai on map:

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Listing cities & postcodes (1):
>> Nakhon Sie Thammarat, 80190 Chian Yai, GPS coordinates: 8.1667,100.15