Monuments
Benchmarks in the Falling Rock Watershed
Using a laser EDM and the trigometric leveling method,
10 bench marks were monumented along a N60W transect
line starting from a point (FR-0) near Drill Knob which
is situated at the top of Falling Rock watershed in the
main block of the Robinson Forest. Field surveys were
concluded in August 1995, while computation and monumentation
were finished in April 1997. Each bench mark is identified
by a strip of laminated paper attached to a nail on a tree
trunk. Additional identifications are given by the tree's
common name and a numbered, round-shaped aluminum tag. The
datums used are NAD83 and NAVD29 (MSL). Monument horizontal
locations are given in U.S. State Plane Coordinate System
(Kentucky South Zone). The vertical error is less 3 feet
(positively biased). The horizontal accuracy of absolute
point positions is approximately +/-180 feet in Northing and
+/- 150 feet in Easting. However, the relative distance between
any pair of bench marks is accurate to about 2 feet. Geographic
locations, expressed in feet, of these bench marks can be viewed
on the Falling Rock Watershed Image.
| Bench Mark |
ID Tag |
ID Tree |
Northing-ft |
Easting-ft |
Elevation |
| FR-0 |
104 |
Hickory |
2065231 |
2401957 |
1386 |
| FR-1 |
107 |
Birth |
2065523 |
2401517 |
1256 |
| FR-2 |
108 |
White Oak |
2065803 |
2401031 |
1113 |
| FR-3 |
109 |
Yellow Popular |
2066121 |
2400462 |
1120 |
| FR-4 |
110 |
Basswood |
2066383 |
2400027 |
1034 |
| FR-5 |
111 |
Cucumber Tree |
2066723 |
2399490 |
1077 |
| FR-6 |
112 |
Sourwood |
2066960 |
2399018 |
1183 |
| FR-7 |
113 |
White Oak |
2067241 |
2398578 |
1158 |
| FR-8 |
114 |
Pine |
2067469 |
2398179 |
1146 |
| FR-9 |
115 |
Maple |
2067712 |
2397750 |
956 |
Robinson Forest High Accuracy Monuments
Three Robinson Forest high accuracy monuments were established in May
1997, using satellite (GPS) and terrestrial (tansit) survey techniques.
The geodetic datum is NAD83 and the positioning accuracy is one
centimeter (RMS) horizontal.
| Coordinate System - SPCS, 1602 (Kentucky South)
|
| Monument Number |
Location Name |
Northing (ft) |
Easting (ft) |
Elevation (ft) |
| RF GPS #1 |
White Oak |
2063775.7310 |
2402430.0970 |
1014.4788 |
| RF GPS #2 |
Wet Fork |
2070342.4173 |
2399869.3166 |
1111.8223 |
| RF GPS #3 |
Big Millseat |
2066321.4052 |
2396805.4606 |
1035.4695 |
| Coordinate System - Geodetic
|
| Monument Number |
Location Name |
Latitude (ddmmss.s) |
Longitude (ddmmss.s) |
HAE (m) |
| RF GPS #1 |
White Oak |
37-28-01.2809N |
83-07-26.5886W |
277.0550 |
| RF GPS #2 |
Wet Fork |
37-29-06.8840N |
83-07-56.0844W |
306.7273 |
| RF GPS #3 |
Big Millseat |
37-28-27.9805N |
83-08-35.4605W |
283.5026 |
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