HARN Gabri 7 years ago [geodesy] Acronym for High Accuracy Reference Network. A regional or statewide resurvey and readjustment 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. Related Terms angular unit antipode Clarke ellipsoid of 1866 datum level degree
