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 17:38:02 EST
DG6958 ***********************************************************************
DG6958 HT_MOD - This is a Height Modernization Survey Station.
DG6958 CORS - This is a GPS Continuously Operating Reference Station.
DG6958 DESIGNATION - TOMBALL COOP CORS ARP
DG6958 CORS_ID - WLA1
DG6958 PID - DG6958
DG6958 STATE/COUNTY- TX/HARRIS
DG6958 COUNTRY - US
DG6958 USGS QUAD - ROSE HILL (2019)
DG6958
DG6958 *CURRENT SURVEY CONTROL
DG6958 ______________________________________________________________________
DG6958* NAD 83(2011) POSITION- 30 05 47.06532(N) 095 37 30.57426(W) ADJUSTED
DG6958* NAD 83(2011) ELLIP HT- 36.035 (meters) (06/??/19) ADJUSTED
DG6958* NAD 83(2011) EPOCH - 2010.00
DG6958* NAVD 88 ORTHO HEIGHT - **(meters) **(feet) NOT PUB
DG6958 **This station is in an area of suspected vertical motion (see below).
DG6958 ______________________________________________________________________
DG6958 NAVD 88 orthometric height was determined with geoid model GEOID09
DG6958 GEOID HEIGHT - -27.624 (meters) GEOID09
DG6958 GEOID HEIGHT - -27.589 (meters) GEOID18
DG6958 NAD 83(2011) X - -541,357.746 (meters) COMP
DG6958 NAD 83(2011) Y - -5,496,340.559 (meters) COMP
DG6958 NAD 83(2011) Z - 3,179,642.548 (meters) COMP
DG6958
DG6958.Formal positional accuracy estimates are not available for this CORS
DG6958.because its coordinates were determined in part using modeled
DG6958.velocities. Approximate one-sigma accuracies for latitude, longitude,
DG6958.and ellipsoid height can be obtained from the short-term time series.
DG6958.Additional information regarding modeled velocities is available on
DG6958.the CORS Coordinates for MYCS2 web page:
DG6958.https://www.ngs.noaa.gov/CORS/news/mycs2/mycs2.shtml.
DG6958
DG6958.The coordinates were established by GPS observations
DG6958.and adjusted by the National Geodetic Survey in June 2019.
DG6958
DG6958.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DG6958.been affixed to the stable North American Tectonic Plate.
DG6958
DG6958.The coordinates are valid at the epoch date displayed above
DG6958.which is a decimal equivalence of Year/Month/Day.
DG6958
DG6958.Due to the release of the International GNSS Service (IGS) 2014
DG6958.realization of the International Terrestrial Reference Frame of 2014
DG6958.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DG6958.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DG6958.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DG6958.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DG6958.currently published epoch of 2010.00.
DG6958
DG6958.Additional information on MYCS2 is available at
DG6958.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DG6958
DG6958.** This station is in an area of suspected land subsidence, uplift, or
DG6958.** crustal motion. NGS recommends this and all published orthometric
DG6958.** heights in such areas be validated before use as vertical control.
DG6958.** Click here to see a list and map of nearby stations with valid
DG6958.** orthometric heights. Note: While datasheets are updated in real-time,
DG6958.** updates to archived datasheets and the SE TX Valid OH map occur
DG6958.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
DG6958.** heights as vertical control as they are deemed unreliable.
DG6958.**
DG6958.** If an established orthometric height is unavailable in the survey control
DG6958.** section, it should be considered suspect. To view suspect heights,
DG6958.** (in the superseded section), select 'Include suspect heights in vertical
DG6958.** motion areas' box from the datasheet retrieval page.
DG6958
DG6958.Significant digits in the geoid height do not necessarily reflect accuracy.
DG6958.GEOID18 height accuracy estimate available here.
DG6958
DG6958.The PID for the CORS L1 Phase Center is DG6959.
DG6958
DG6958.Click photographs - Photos may exist for this station.
DG6958
DG6958.The XYZ, and position/ellipsoidal ht. are equivalent.
DG6958
DG6958.The ellipsoidal height was determined by GPS observations
DG6958.and is referenced to NAD 83.
DG6958
DG6958. The following values were computed from the NAD 83(2011) position.
DG6958
DG6958; North East Units Scale Factor Converg.
DG6958;SPC TXSC - 4,255,508.593 925,249.631 MT 0.99995135 +1 39 12.2
DG6958;SPC TXSC -13,961,614.44 3,035,589.83 sFT 0.99995135 +1 39 12.2
DG6958;UTM 15 - 3,332,375.687 247,010.205 MT 1.00038972 -1 19 01.6
DG6958
DG6958! - Elev Factor x Scale Factor = Combined Factor
DG6958!SPC TXSC - 0.99999434 x 0.99995135 = 0.99994569
DG6958!UTM 15 - 0.99999434 x 1.00038972 = 1.00038406
DG6958
DG6958_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RTP4701032375(NAD 83)
DG6958
DG6958 SUPERSEDED SURVEY CONTROL
DG6958
DG6958 ELLIP H (06/27/12) 36.017 (m) GP(2010.00) 0 0
DG6958 NAD 83(2011)- 30 05 47.06563(N) 095 37 30.57418(W) AD(2010.00) c
DG6958 NAD 83(2011)- 30 05 47.06531(N) 095 37 30.57423(W) AD(2010.00) c
DG6958 ELLIP H (08/??/11) 36.032 (m) GP(2010.00) c c
DG6958 NAD 83(CORS)- 30 05 47.06586(N) 095 37 30.57562(W) AD(2002.00) c
DG6958 ELLIP H (12/??/08) 36.157 (m) GP(2002.00) c c
DG6958 NAD 83(CORS)- 30 05 47.06578(N) 095 37 30.57507(W) AD(2002.00) c
DG6958 ELLIP H (08/??/04) 36.133 (m) GP(2002.00) c c
DG6958
DG6958.Superseded values are not recommended for survey control.
DG6958
DG6958.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DG6958.See file dsdata.pdf to determine how the superseded data were derived.
DG6958
DG6958_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DG6958
DG6958 STATION DESCRIPTION
DG6958
DG6958'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DG6958'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DG6958'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DG6958'ACCESSIBLE AT THE WORLDWIDE WEB.
DG6958'https://geodesy.noaa.gov/CORS/data.shtml
DG6958'https://geodesy.noaa.gov/CORS
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