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Details for Benchmark: SY1639

N 47° 57.298 W 123° 15.577 (NAD 83)

Altitude: 0

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

Location:
In CLALLAM county, WA View Original Datasheet
Designation:
LONE
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

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Documented History (by the NGS)

1/1/1926 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1926 (HAC) STATION IS A HIGH AND RATHER ISOLATED MOUNTAIN S OF GREEN POINT. THE TOP IS SOMEWHAT FLAT AND IRREGULAR, THE SUMMIT APPEARING FARTHEST BACK. FROM DIRECTLY OFFSHORE SUMMIT APPEARS AS THE CENTER OF THREE KNOBS.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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