Average GPS coordinates for Great Valley Postcode location: 42.208, -78.621. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Great Valley on map:

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Listing cities & postcodes (1):
>> New York, 14741 Great Valley, Cattaraugus, GPS coordinates: 42.2083,-78.6208