Average GPS coordinates for Palmer Postcode location: -34.85, 139.167. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Palmer on map:

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Listing cities & postcodes (1):
>> South Australia, 5237 Palmer, SA SUBS NEAR 2, GPS coordinates: -34.85,139.1667