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 08:40:54 EST
DH3614 ***********************************************************************
DH3614 HT_MOD - This is a Height Modernization Survey Station.
DH3614 CORS - This is a GPS Continuously Operating Reference Station.
DH3614 DESIGNATION - LA MARQUE CORS ARP
DH3614 CORS_ID - TXLM
DH3614 PID - DH3614
DH3614 STATE/COUNTY- TX/GALVESTON
DH3614 COUNTRY - US
DH3614 USGS QUAD - DICKINSON (2019)
DH3614
DH3614 *CURRENT SURVEY CONTROL
DH3614 ______________________________________________________________________
DH3614* NAD 83(2011) POSITION- 29 23 31.98665(N) 095 01 25.23744(W) ADJUSTED
DH3614* NAD 83(2011) ELLIP HT- -16.151 (meters) (04/??/22) ADJUSTED
DH3614* NAD 83(2011) EPOCH - 2010.00
DH3614* NAVD 88 ORTHO HEIGHT - 10.67 (meters) 35.0 (feet) GPS OBS
DH3614 **This station is in an area of suspected vertical motion (see below).
DH3614 ______________________________________________________________________
DH3614 NAVD 88 orthometric height was determined with an earlier geoid model
DH3614 GEOID HEIGHT - -26.860 (meters) GEOID18
DH3614 NAD 83(2011) X - -487,016.456 (meters) COMP
DH3614 NAD 83(2011) Y - -5,540,253.550 (meters) COMP
DH3614 NAD 83(2011) Z - 3,111,843.278 (meters) COMP
DH3614
DH3614 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DH3614 Standards:
DH3614 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DH3614 Horiz Ellip SD_N SD_E SD_h (unitless)
DH3614 -------------------------------------------------------------------
DH3614 NETWORK 0.20 0.43 0.05 0.10 0.22 0.14894800
DH3614 -------------------------------------------------------------------
DH3614
DH3614.The coordinates were established by GPS observations
DH3614.and adjusted by the National Geodetic Survey in April 2022.
DH3614
DH3614.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DH3614.been affixed to the stable North American Tectonic Plate.
DH3614
DH3614.The coordinates are valid at the epoch date displayed above
DH3614.which is a decimal equivalence of Year/Month/Day.
DH3614
DH3614.Due to the release of the International GNSS Service (IGS) 2014
DH3614.realization of the International Terrestrial Reference Frame of 2014
DH3614.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DH3614.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DH3614.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DH3614.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DH3614.currently published epoch of 2010.00.
DH3614
DH3614.Additional information on MYCS2 is available at
DH3614.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DH3614
DH3614.** This station is in an area of suspected land subsidence, uplift, or
DH3614.** crustal motion. NGS recommends this and all published orthometric
DH3614.** heights in such areas be validated before use as vertical control.
DH3614.** Click here to see a list and map of nearby stations with valid
DH3614.** orthometric heights. Note: While datasheets are updated in real-time,
DH3614.** updates to archived datasheets and the SE TX Valid OH map occur
DH3614.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
DH3614.** heights as vertical control as they are deemed unreliable.
DH3614.**
DH3614.** If an established orthometric height is unavailable in the survey control
DH3614.** section, it should be considered suspect. To view suspect heights,
DH3614.** (in the superseded section), select 'Include suspect heights in vertical
DH3614.** motion areas' box from the datasheet retrieval page.
DH3614
DH3614.The orthometric height was determined by GPS observations and a
DH3614.high-resolution geoid model using precise GPS observation and
DH3614.processing techniques.
DH3614
DH3614.Significant digits in the geoid height do not necessarily reflect accuracy.
DH3614.GEOID18 height accuracy estimate available here.
DH3614
DH3614.The PID for the CORS L1 Phase Center is DR7678.
DH3614
DH3614.Click photographs - Photos may exist for this station.
DH3614
DH3614.The XYZ, and position/ellipsoidal ht. are equivalent.
DH3614
DH3614.The ellipsoidal height was determined by GPS observations
DH3614.and is referenced to NAD 83.
DH3614
DH3614. The following values were computed from the NAD 83(2011) position.
DH3614
DH3614; North East Units Scale Factor Converg.
DH3614;SPC TXSC - 4,179,325.687 985,849.917 MT 0.99986374 +1 56 53.0
DH3614;SPC TXSC -13,711,671.02 3,234,409.27 sFT 0.99986374 +1 56 53.0
DH3614;UTM 15 - 3,253,143.847 303,621.372 MT 1.00007588 -0 59 36.6
DH3614
DH3614! - Elev Factor x Scale Factor = Combined Factor
DH3614!SPC TXSC - 1.00000254 x 0.99986374 = 0.99986628
DH3614!UTM 15 - 1.00000254 x 1.00007588 = 1.00007842
DH3614
DH3614_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RUN0362153143(NAD 83)
DH3614
DH3614 SUPERSEDED SURVEY CONTROL
DH3614
DH3614 NAD 83(2011)- 29 23 31.98665(N) 095 01 25.23755(W) AD(2010.00) c
DH3614 ELLIP H (06/??/19) -16.172 (m) GP(2010.00) c c
DH3614 ELLIP H (06/27/12) -16.164 (m) GP(2010.00) 0 0
DH3614 NAD 83(2011)- 29 23 31.98678(N) 095 01 25.23764(W) AD(2010.00) c
DH3614 NAD 83(2011)- 29 23 31.98663(N) 095 01 25.23757(W) AD(2010.00) c
DH3614 ELLIP H (08/??/11) -16.174 (m) GP(2010.00) c c
DH3614 NAD 83(CORS)- 29 23 31.98669(N) 095 01 25.23786(W) AD(2002.00) c
DH3614 ELLIP H (06/??/05) -16.145 (m) GP(2002.00) c c
DH3614 NAVD 88 (06/07/10) 10.65 (m) GEOID09 model used GPS OBS
DH3614
DH3614.Superseded values are not recommended for survey control.
DH3614
DH3614.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DH3614.See file dsdata.pdf to determine how the superseded data were derived.
DH3614
DH3614_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DH3614
DH3614 STATION DESCRIPTION
DH3614
DH3614'DESCRIBED BY NATIONAL GEODETIC SURVEY 2022
DH3614'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DH3614'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DH3614'ACCESSIBLE AT THE WORLDWIDE WEB.
DH3614'https://geodesy.noaa.gov/CORS/data.shtml
DH3614'https://geodesy.noaa.gov/CORS
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