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Details for Benchmark: NA0878

N 42° 42.067 W 074° 55.750 (NAD 83)

Altitude: 1262.55

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

Location:
In OTSEGO county, NY View Original Datasheet
Designation:
MERIDIAN MARK NORTH
Marker Type:
survey disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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The marker is missing hafe. Is harde to find in the snow.

N 42° 42.075 W 074° 55.767

This mark still exists and was an easy find, but it's in very poor condition. Someone apparently tried to pry off the disk, and it snapped in half. At least the vandals didn't get their “prize”. The description is accurate except that there is no longer a maple tree within 4 feet of the mark.

Zhanna and Aaron

[Photos:]
photoNA08778, Otsego County, NY
photoThe disk (or half of it) in its marble post.
photoThe monument just off the sidewalk, with the county courthouse in the background.

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1942 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1942 AT COOPERSTOWN. AT COOPERSTOWN, OTSEGO COUNTY, AT THE COUNTY COURTHOUSE, 36 FEET SOUTH OF THE CENTER OF THE INTERSECTION OF MAIN STREET AND NELSON AVENUE, 6 FEET SOUTH OF THE CENTERLINE OF THE SIDEWALK, AND 4 FEET WEST OF A 2-FOOT MAPLE TREE. A UNITED STATES GEOLOGICAL SURVEY STANDARD DISK, SET IN THE TOP OF A MARBLE POST ABOUT FLUSH WITH THE GROUND.

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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