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Details for Benchmark: NB0197

N 42° 36.333 W 076° 10.583 (NAD 83)

Altitude: 1111.69

Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)

Location:
In CORTLAND county, NY View Original Datasheet
Designation:
X 109
Marker Type:
bench mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1942 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1942 0.4 MI N FROM CORTLAND. 0.4 MILE NORTH ALONG THE ERIE-LACKAWANNA RAILROAD FROM THE STATION AT CORTLAND, CORTLAND COUNTY, AT THE CROSSING OF GRANT STREET, 23 FEET EAST OF THE EAST RAIL OF THE EAST MAIN TRACK, 20.6 FEET SOUTH OF THE CENTERLINE OF THE STREET, 6.6 FEET SOUTH OF THE SOUTH CURB OF THE STREET, 1 FOOT NORTH OF THE NORTH EDGE OF THE SIDEWALK, 3 FEET WEST OF A WHITE WOODEN WITNESS POST, LEVEL WITH THE STREET, AND 0.1 FOOT BELOW THE SURFACE OF THE GROUND. A STANDARD DISK, STAMPED X 109 1935 AND SET IN THE TOP OF A CONCRETE POST.
05/02/1995 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1995 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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