Average GPS coordinates for Groton Postcode location: 42.586, -76.363. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Groton on map:

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Listing cities & postcodes (1):
>> New York, 13073 Groton, Tompkins, GPS coordinates: 42.5855,-76.3633