Average GPS coordinates for Rosny Postcode location: -42.871, 147.357. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Rosny on map:

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Listing cities & postcodes (1):
>> Tasmania, 7018 Rosny, TASMANIA, GPS coordinates: -42.8707,147.357