Details for Benchmark: AB2059
N 35° 51.646 W 079° 04.947 (NAD 83)
Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED. (more info)
- In ORANGE county, NC View Original Datasheet
- COUNTY LINE 7
- Marker Type:
- boundary marker disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1993 by NCGS (MONUMENTED)
|DESCRIBED BY NORTH CAROLINA GEODETIC SURVEY 1993 (EWB)
STATION IS LOCATED ABOUT 3.9 MI (6.3 KM) SOUTH-SOUTHWEST OF CHAPEL HILL AND 11.1 MI (17.9 KM) NORTH-NORTHEAST OF PITTSBORO.
ALONG US 15-501 FOR 2.9 MI (4.7 KM) SOUTH FROM THE NC 54 OVERPASS, AT THE SR 1919 (SMITH LEVEL ROAD) T-INTERSECTION, AT THE ORANGE/CHATHAM COUNTY LINE, IN THE YARD OF AN EDUCATIONAL DAY CARE.
MARK IS 1 FOOT HIGHER THAN THE ROAD. LOCATED 40.8 FT (12.4 M) EAST OF THE NORTHEAST CORNER OF A FRAME DWELLING, 23.7 FT (7.2 M) NORTH-NORTHEAST OF THE CENTER OF A CONCRETE WELL, 92.0 FT (28.0 M) SOUTH-SOUTHWEST OF A METAL SIGN POLE, 115.1 FT (35.1 M) NORTH-NORTHWEST OF THE NORTH END OF A HIGHWAY CULVERT, AND 26.4 FT (8.0 M) EAST OF A 36-INCH TWIN-TRUNK OAK WITH A REFERENCE TAG.
- The North Carolina/South Carolina HARNS have been completed but, due to contractual restrictions, coordinates for these stations will NOT be published in the near future. In the interim, the published coordinates in North and South Carolina will not be consistent with the Continuously Operating Reference Stations (CORS). The HARN coordinates for these stations are available upon request. Contact Gary Thompson(919-733-3836), or Lewis Lapine(803-896-7700). In addition, the published North and South Carolina positions (NAD 83 (1986)) are NOT consistent with those determined in adjacent state readjustments. The discontinuity between stations located in North or South Carolina and those in adjacent states which have been adjusted to the HARN may be as much as 5 decimeters. This will result in a significant loss of accuracy over lines crossing such state borders.
- The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1996.
- The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
- The Laplace correction was computed from DEFLEC99 derived deflections.
- The geoid height was determined by GEOID99.