| PID:
|
JV0578 |
| Designation:
|
857 4680 TIDAL BASIC |
| Stamping:
|
NONE |
| Stability:
|
May hold commonly subject to ground movement |
| Setting:
|
Set in top of concrete monument |
| Mark Condition:
|
G |
| Description:
|
The bench mark is a USC&GS disk set in the top of a concrete monument in the grassy area between the Francis Scott Key memorial statue and the visitors center on the Fort McHenry grounds, 89 m (292 ft) east of the east face of the bottom step of the memorial, 64.6m (212.0 ft) SSE of the south curb of Fort Avenue, 30.48m (100.0 ft) East of the Easterly of two trees, and 0.61 m (2.0 ft) above the ground. The monument bears the inscription UNITED STATES COAST AND GEODETIC SURVEY BASIC BENCH MARK. |
| Observed:
|
2021-11-01T14:45:00Z |
more obs 2019-03-25
|
| Source:
|
OPUS - page5 2008.25 |
|
|
|
| Close-up View
|
|
| REF_FRAME:
NAD_83(2011) |
EPOCH:
2010.0000 |
SOURCE:
NAVD88 (Computed using GEOID18) |
UNITS:
m |
SET PROFILE
|
DETAILS
|
|
| LAT:
|
39° 15' 50.88798"
|
± 0.004
m |
| LON:
|
-76° 34' 51.83407"
|
±
0.004
m |
| ELL HT:
|
-23.590 |
±
0.021
m |
| X:
|
1147537.219 |
±
0.001
m |
| Y:
|
-4809805.665 |
±
0.017
m |
| Z:
|
4015048.349 |
±
0.012
m |
| ORTHO HT:
|
9.259 |
±
0.054
m |
|
|
UTM
18 |
SPC
1900(MD) |
| NORTHING:
|
4347279.913m |
177411.816m |
| EASTING:
|
363599.804m |
436154.403m |
| CONVERGENCE:
|
-1.00080556°
|
0.26293889°
|
| POINT SCALE:
|
0.99982908 |
0.99997277 |
| COMBINED FACTOR:
|
0.99983278 |
0.99997647 |
|
|
|
|
| Horizon View
|
|
|
|
|