Average GPS coordinates for Greenwich Postcode location: -33.841, 151.183. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Greenwich on map:

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Listing cities & postcodes (1):
>> New South Wales, 2065 Greenwich, CHATSWOOD, GPS coordinates: -33.8406,151.1831