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Details for Benchmark: EM0836

N 34° 36.901 W 098° 39.710 (NAD 83)

Altitude: 1311

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

Location:
In COMANCHE county, OK View Original Datasheet
Designation:
DOTS 1961 RM 3 USA
Marker Type:
reference mark 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)

01/01/1973 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 (CLN) REFERENCE MARK NO. 3 USA IS A STANDARD DISK, SET IN THE TOP OF A ROUND CONCRETE POST, THAT IS FLUSH WITH THE GROUND AND IS STAMPED DOTS 1961 NO 3 USA 1974. IT IS 106 FEET NORTH OF THE FENCE-CORNER OF PASTURE, 72 FEET NORTHWEST OF THE SOUTHWEST CORNER OF CHAIN-LINK FENCE OF COMPOUND, 45 FEET WEST OF CHAIN-LINK FENCE AND 5 FEET EAST OF PASTURE FENCE-LINE.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1994.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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.

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