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 17, 2025 16:55:42 EST
DL8635 ***********************************************************************
DL8635 HT_MOD - This is a Height Modernization Survey Station.
DL8635 CORS - This is a GPS Continuously Operating Reference Station.
DL8635 DESIGNATION - GALVEZ MIDDLE SCH CORS ARP
DL8635 CORS_ID - GVMS
DL8635 PID - DL8635
DL8635 STATE/COUNTY- LA/ASCENSION
DL8635 COUNTRY - US
DL8635 USGS QUAD - PRAIRIEVILLE (2018)
DL8635
DL8635 *CURRENT SURVEY CONTROL
DL8635 ______________________________________________________________________
DL8635* NAD 83(2011) POSITION- 30 18 51.79669(N) 090 54 13.02944(W) ADJUSTED
DL8635* NAD 83(2011) ELLIP HT- -15.198 (meters) (06/??/19) ADJUSTED
DL8635* NAD 83(2011) EPOCH - 2010.00
DL8635* NAVD 88 ORTHO HEIGHT - 11.72 (meters) 38.5 (feet) GPS OBS
DL8635* NAVD 88 EPOCH - 2009.55
DL8635 **This station is located in a suspected subsidence area (see below).
DL8635 ______________________________________________________________________
DL8635 NAVD 88 orthometric height was determined with geoid model GEOID12A
DL8635 GEOID HEIGHT - -26.906 (meters) GEOID12A
DL8635 GEOID HEIGHT - -26.884 (meters) GEOID18
DL8635 NAD 83(2011) X - -86,906.926 (meters) COMP
DL8635 NAD 83(2011) Y - -5,510,049.721 (meters) COMP
DL8635 NAD 83(2011) Z - 3,200,500.396 (meters) COMP
DL8635
DL8635 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DL8635 Standards:
DL8635 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DL8635 Horiz Ellip SD_N SD_E SD_h (unitless)
DL8635 -------------------------------------------------------------------
DL8635 NETWORK 0.16 0.35 0.04 0.08 0.18 0.03169700
DL8635 -------------------------------------------------------------------
DL8635
DL8635.The coordinates were established by GPS observations
DL8635.and adjusted by the National Geodetic Survey in June 2019.
DL8635
DL8635.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DL8635.been affixed to the stable North American Tectonic Plate.
DL8635
DL8635.The coordinates are valid at the epoch date displayed above
DL8635.which is a decimal equivalence of Year/Month/Day.
DL8635
DL8635.Due to the release of the International GNSS Service (IGS) 2014
DL8635.realization of the International Terrestrial Reference Frame of 2014
DL8635.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DL8635.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DL8635.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DL8635.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DL8635.currently published epoch of 2010.00.
DL8635
DL8635.Additional information on MYCS2 is available at
DL8635.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DL8635
DL8635.** This station is in an area of known vertical motion. Due to the
DL8635.** variability of land subsidence, uplift, and crustal motion, NGS has,
DL8635.** determined the orthometric heights for marks in these suspect
DL8635.** subsidence areas should be considered valid only at the epoch date
DL8635.** associated with the orthometric height. These heights must always
DL8635.** be validated when used as control. All previously superseded
DL8635.** orthometric heights are now considered suspect and are available
DL8635.** in the superseded section. NGS does not recommend using suspect
DL8635.** or superseded heights as control.
DL8635
DL8635.The orthometric height was determined by GPS observations and a
DL8635.high-resolution geoid model using precise GPS observation and
DL8635.processing techniques.
DL8635
DL8635.Significant digits in the geoid height do not necessarily reflect accuracy.
DL8635.GEOID18 height accuracy estimate available here.
DL8635
DL8635.The PID for the CORS L1 Phase Center is DR1521.
DL8635
DL8635.Click photographs - Photos may exist for this station.
DL8635
DL8635.The XYZ, and position/ellipsoidal ht. are equivalent.
DL8635
DL8635.The ellipsoidal height was determined by GPS observations
DL8635.and is referenced to NAD 83.
DL8635
DL8635. The following values were computed from the NAD 83(2011) position.
DL8635
DL8635; North East Units Scale Factor Converg.
DL8635;SPC LA S - 201,192.997 1,041,327.648 MT 0.99994066 +0 12 53.5
DL8635;SPC LA S - 660,080.69 3,416,422.46 sFT 0.99994066 +0 12 53.5
DL8635;UTM 15 - 3,355,484.765 701,572.934 MT 1.00010129 +1 03 30.6
DL8635
DL8635! - Elev Factor x Scale Factor = Combined Factor
DL8635!SPC LA S - 1.00000239 x 0.99994066 = 0.99994305
DL8635!UTM 15 - 1.00000239 x 1.00010129 = 1.00010368
DL8635
DL8635_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RYP0157255484(NAD 83)
DL8635
DL8635 SUPERSEDED SURVEY CONTROL
DL8635
DL8635 NAD 83(2011)- 30 18 51.79675(N) 090 54 13.02952(W) AD(2010.00) c
DL8635 ELLIP H (08/??/11) -15.202 (m) GP(2010.00) c c
DL8635 NAD 83(CORS)- 30 18 51.79688(N) 090 54 13.03027(W) AD(2002.00) c
DL8635 ELLIP H (06/??/10) -15.193 (m) GP(2002.00) c c
DL8635
DL8635.Superseded values are not recommended for survey control.
DL8635
DL8635.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DL8635.See file dsdata.pdf to determine how the superseded data were derived.
DL8635
DL8635_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DL8635
DL8635 STATION DESCRIPTION
DL8635
DL8635'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DL8635'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DL8635'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DL8635'ACCESSIBLE AT THE WORLDWIDE WEB.
DL8635'https://geodesy.noaa.gov/CORS/data.shtml
DL8635'https://geodesy.noaa.gov/CORS
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