The NGS Data Sheet
See file dsdata.pdf for more information about the datasheet.
PROGRAM = datasheet95, VERSION = 8.12.5.19
Starting Datasheet Retrieval...
1 National Geodetic Survey, Retrieval Date = FEBRUARY 18, 2025 16:09:25 EST
DN8741 ***********************************************************************
DN8741 HT_MOD - This is a Height Modernization Survey Station.
DN8741 CORS - This is a GPS Continuously Operating Reference Station.
DN8741 DESIGNATION - WILLIAMSTON 2 CORS ARP
DN8741 CORS_ID - NCWM
DN8741 PID - DN8741
DN8741 STATE/COUNTY- NC/MARTIN
DN8741 COUNTRY - US
DN8741 USGS QUAD - WILLIAMSTON (2019)
DN8741
DN8741 *CURRENT SURVEY CONTROL
DN8741 ______________________________________________________________________
DN8741* NAD 83(2011) POSITION- 35 49 49.75731(N) 077 02 06.20974(W) ADJUSTED
DN8741* NAD 83(2011) ELLIP HT- -21.878 (meters) (05/??/20) ADJUSTED
DN8741* NAD 83(2011) EPOCH - 2010.00
DN8741* NAVD 88 ORTHO HEIGHT - 14.18 (meters) 46.5 (feet) GPS OBS
DN8741 ______________________________________________________________________
DN8741 NAVD 88 orthometric height was determined with geoid model GEOID12A
DN8741 GEOID HEIGHT - -36.050 (meters) GEOID12A
DN8741 GEOID HEIGHT - -36.060 (meters) GEOID18
DN8741 NAD 83(2011) X - 1,161,487.991 (meters) COMP
DN8741 NAD 83(2011) Y - -5,045,039.039 (meters) COMP
DN8741 NAD 83(2011) Z - 3,712,946.059 (meters) COMP
DN8741
DN8741 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DN8741 Standards:
DN8741 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DN8741 Horiz Ellip SD_N SD_E SD_h (unitless)
DN8741 -------------------------------------------------------------------
DN8741 NETWORK 0.12 0.27 0.04 0.06 0.14 -0.28236400
DN8741 -------------------------------------------------------------------
DN8741
DN8741.The coordinates were established by GPS observations
DN8741.and adjusted by the National Geodetic Survey in May 2020.
DN8741
DN8741.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DN8741.been affixed to the stable North American Tectonic Plate.
DN8741
DN8741.The coordinates are valid at the epoch date displayed above
DN8741.which is a decimal equivalence of Year/Month/Day.
DN8741
DN8741.Due to the release of the International GNSS Service (IGS) 2014
DN8741.realization of the International Terrestrial Reference Frame of 2014
DN8741.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DN8741.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DN8741.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DN8741.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DN8741.currently published epoch of 2010.00.
DN8741
DN8741.Additional information on MYCS2 is available at
DN8741.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DN8741
DN8741.The orthometric height was determined by GPS observations and a
DN8741.high-resolution geoid model using precise GPS observation and
DN8741.processing techniques.
DN8741
DN8741.Significant digits in the geoid height do not necessarily reflect accuracy.
DN8741.GEOID18 height accuracy estimate available here.
DN8741
DN8741.The PID for the CORS L1 Phase Center is DQ9074.
DN8741
DN8741.Click photographs - Photos may exist for this station.
DN8741
DN8741.The XYZ, and position/ellipsoidal ht. are equivalent.
DN8741
DN8741.The ellipsoidal height was determined by GPS observations
DN8741.and is referenced to NAD 83.
DN8741
DN8741. The following values were computed from the NAD 83(2011) position.
DN8741
DN8741; North East Units Scale Factor Converg.
DN8741;SPC NC - 232,550.202 787,120.808 MT 0.99992350 +1 08 02.8
DN8741;SPC NC - 762,958.45 2,582,412.18 sFT 0.99992350 +1 08 02.8
DN8741;UTM 18 - 3,967,058.839 316,181.055 MT 1.00001638 -1 11 29.9
DN8741
DN8741! - Elev Factor x Scale Factor = Combined Factor
DN8741!SPC NC - 1.00000343 x 0.99992350 = 0.99992693
DN8741!UTM 18 - 1.00000343 x 1.00001638 = 1.00001981
DN8741
DN8741_U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUE1618167058(NAD 83)
DN8741
DN8741 SUPERSEDED SURVEY CONTROL
DN8741
DN8741 NAD 83(2011)- 35 49 49.75733(N) 077 02 06.20978(W) AD(2010.00) c
DN8741 ELLIP H (06/??/19) -21.891 (m) GP(2010.00) c c
DN8741 NAD 83(2011)- 35 49 49.75739(N) 077 02 06.20973(W) AD(2010.00) c
DN8741 ELLIP H (06/??/12) -21.901 (m) GP(2010.00) c c
DN8741 NAD 83(CORS)- 35 49 49.75775(N) 077 02 06.21034(W) AD(2002.00) c
DN8741 ELLIP H (06/??/12) -21.889 (m) GP(2002.00) c c
DN8741 NAVD 88 (04/09/14) 14.182 (m) 46.53 (f) ADJUSTED 2 2
DN8741
DN8741.Superseded values are not recommended for survey control.
DN8741
DN8741.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DN8741.See file dsdata.pdf to determine how the superseded data were derived.
DN8741
DN8741_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DN8741
DN8741 STATION DESCRIPTION
DN8741
DN8741'DESCRIBED BY NATIONAL GEODETIC SURVEY 2020
DN8741'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DN8741'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DN8741'ACCESSIBLE AT THE WORLDWIDE WEB.
DN8741'https://geodesy.noaa.gov/CORS/data.shtml
DN8741'https://geodesy.noaa.gov/CORS
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