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Details for Benchmark: DG0136

N 33° 45.726 W 084° 20.356 (NAD 83)

Altitude: 1039.77

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

Location:
In DE KALB county, GA View Original Datasheet
Designation:
MAYSON
Marker Type:
traverse station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Documented History (by the NGS)

01/01/1927 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1927 (EOH) TRAVERSE STATION AND BENCH MARK IS ON N SIDE OF DE KALB AVENUE BETWEEN MAYSON AND WHITEFOORD AVENUES IN SIDEWALK, APPROXIMATELY 150 FEET W FROM PROJECTION OF W PROPERTY LINE ON W SIDE OF MAYSON AVENUE, 3.65 FEET N FROM N CURB OF DE KALB AVENUE, 18.75 FEET W FROM TELEPHONE POLE ON N SIDE OF DE KALB AVENUE, 77.62 FEET W FROM CENTER OF MANHOLE COVER IN S SIDE OF DE KALB AVENUE, 85.1 FEET N FROM FIRE HYDRANT IN S SIDE OF DE KALB AVENUE, 15.93 FEET E FROM TELEPHONE POLE IN N SIDE OF DE KALB AVENUE, AND 67.56 FEET E FROM HAND RAIL OF STONE STEPS ON N SIDE OF N SIDEWALK OF DE KALB AVENUE. STATION MARK IS A STANDARD DISK SET IN CONCRETE CYLINDER, 5 FEET LONG, 10 INCHES IN DIAMETER AT THE TOP AND 18 INCHES IN DIAMETER AT THE BASE. CAST-IRON COVER OVER TOP OF MARK.
01/01/1952 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1952 (EBL) THE STATION IS ABOUT 2.9 MILES E OF DOWNTOWN FIVE POINTS IN ATLANTA, 176 FEET W OF THE CENTER LINE OR 161 FEET W OF THE W CURB OF MAYSON AVENUE N.E., ABOUT 110 FEET E OF THE LOCAL SUMMIT OF THE STREET GRADES, 20 FEET N OF THE CENTER LINE OR 3.5 FEET N OF THE N CURB OF DE KALB AVENUE N.E., 8 FEET W OF THE PROJECTED PLANE OF THE W WALL OF A ONE-STORY BRICK-AND-STONE BUILDING, AND 2.5 FEET S OF THE CENTER LINE OF THE SIDEWALK ON THE N SIDE OF DE KALB AVENUE. STATION MARK IS A STANDARD DISK SET IN CONCRETE. IT IS 0.5 FOOT BELOW A CAST-IRON COVER THAT IS FLUSH WITH THE SIDEWALK SURFACE AND THE DISK IS STAMPED MAYSON 1927 1039.506.
01/01/1973 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 AT ATLANTA. IN ATLANTA, ABOUT 2.9 MILES EAST OF DOWNTOWN FIVE POINTS, 176 FEET WEST OF THE CENTERLINE OR 161 FEET WEST OF THE WEST CURB OF MAYSON AVENUE NE, ABOUT 110 FEET EAST OF THE LOCAL SUMMIT OF THE STREET GRADE, 20 FEET NORTH OF THE CENTERLINE OR 3.5 FEET NORTH OF THE NORTH CURB OF DE KALB AVENUE NE, 8 FEET WEST OF THE PROJECTED PLANE OF THE WEST WALL OF A ONE-STORY BRICK-AND-STONE BUILDING, AND 2.5 FEET SOUTH OF THE CENTERLINE OF THE SIDEWALK ON THE NORTH SIDE OF DE KALB AVENUE. A STANDARD TRAVERSE DISK SET IN THE TOP OF A CONCRETE POST THAT IS 0.5 FOOT BELOW A CAST-IRON COVER WHICH IS FLUSH WITH THE SIDEWALK SURFACE.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in September 1997.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • 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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