Details for Benchmark: KY0137
N 40° 47.667 W 080° 08.283 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In BUTLER county, PA View Original Datasheet
- W 201
- Marker Type:
- bench mark disk
- massive structures
- Most reliable and expected to hold position/elevation well.
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Documented History (by the NGS)
|01/01/1954 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1954
AT ZELIENOPLE. AT ZELIENOPLE, ALONG WEST NEW CASTLE STREET BETWEEN CLAY AND MAIN STREET, SET VERTICALLY IN SOUTH FACE OF ZELIENOPLE MUNICIPAL BUILDING, 1 1/2 FEET EAST OF SOUTHWEST CORNER OF BUILDING AND 3 FEET ABOVE SIDE WALK.
|01/01/1983 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983
RECOVERED IN GOOD CONDITION.
- 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.