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What does NAD83 stand for?

USA State Plane Zones NAD83 U.S. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the 1983 North American Datum in the United States. U.S. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the 1983 North American Datum in the United States.

What is the difference between NAD 27 and NAD 83?

From the unified network of survey monument, the result of triangulation was the North American Datum of 1927 (NAD 27). After, geodesists developed the more accurate NAD 83, which we still use today. NAD 27 and NAD 83 provide a frame of reference for latitude and longitude locations on Earth.

How do you convert 1963 coordinates to NAD83 coordinates?

The following datum shift converts coordinates referenced to the Guam 1963 datum to NAD83. Perform the conversion as follows: lat, long (NAD83) = lat + 5.15932", long + 8.71596" NOTE for the above methods: The FCC previously provided these datum shift coordinates rounded to two decimal places.

Is NAD83 geocentric?

However, NAD83 is not geocentric with an offset of about two meters. North American Datum of 1983 is based on the reference ellipsoid GRS80 which is physically larger than NAD27’s Clarke ellipsoid. The GRS80 reference ellipsoid has a semi-major axis of 6,378,137.0 meters and a semi-minor axis of 6,356,752.3 meters.


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