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High Accuracy Reference Network
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[geodesy]
Also known by the acronym
HARN
. A regional or statewide resurvey and readjustment specifically of NAD 1983 control points using GPS techniques. The resurvey date is often included as part of the datum name: NAD 1983 (1991) or NAD91.
See also
control point
GPS
North American Datum of 1983
surveying
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