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Details for Benchmark: DG1081

N 33° 44.550 W 084° 46.733 (NAD 83)

Altitude: 1227.54

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

Location:
In DOUGLAS county, GA View Original Datasheet
Designation:
Q 53
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)

01/01/1953 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1953 2 MI W FROM DOUGLASVILLE. 2 MILES WEST ALONG THE SOUTHERN RAILWAY FROM THE STATION AT DOUGLASVILLE, DOUGLAS COUNTY, 245 YARDS EAST OF MILEPOST 661, AT A ROAD CROSSING, ABOUT 200 YARDS WEST OF THE CENTERLINE OF THE ROAD, AT THE END OF A CUT, AND 32 FEET SOUTH OF THE SOUTH RAIL. A STANDARD DISK, STAMPED Q 53 1934 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 6 INCHES ABOVE GROUND.
01/01/1959 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1959 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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