1 / 21

Adjustments to the National Spatial Reference System Future of the NSRS

Adjustments to the National Spatial Reference System Future of the NSRS. Mississippi Department of Transportation August 20, 2012. Renee Shields Height Modernization Manager. NGS Mission Statement.

jonah-gibbs
Download Presentation

Adjustments to the National Spatial Reference System Future of the NSRS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Adjustments to the National Spatial Reference SystemFuture of the NSRS Mississippi Department of Transportation August 20, 2012 Renee Shields Height Modernization Manager

  2. NGS Mission Statement To define, maintain and provide access to the National Spatial Reference System (NSRS) to meet our nation’s economic, social, and environmental needs.

  3. National Spatial Reference System • The official national coordinate system of the U.S. federal government which includes: • Geodetic latitude, longitude and height • Scale, gravity, and orientation • How these values change with time • Components include: • CORS • Network of passive monuments • Official national shoreline • Precise orbits of GNSS satellites used to define NSRS • Models and tools to describe how all of these quantities change over time.

  4. From the NGS 10-Year Plan • Define the NSRS • “The NSRS must be more accurate than all activities which build upon it, while still being practicably achievable.” • Maintain the NSRS • “NGS must track all of the temporal changes to the defining points of the NSRS in such a way as to always maintain the accuracy in the NSRS definition.” • Provide Access to the NSRS • “NGS must develop and maintain guidelines for users to access the NSRS at a variety of accuracies.” • “NGS will publish all coordinates of defining points of the NSRS with an epoch tag and will furthermore publish velocities relative to that epoch-tagged set of coordinates” http://geodesy.noaa.gov/INFO/ngs_tenyearplan.pdf

  5. The National Geodetic Survey 10 year Plan • Main goal - replace NAD 83 and NAVD 88 • Revisit/re-evaluate periodically • GRAV-D underway, but funding support less than anticipated, so adjust completion date • Incorporate strategic planning and project management techniques, language • The previous plan = big ideas without clearly explaining how to get there, and seemed to presume NGS had unlimited staff resources. • Failed to include day to day mission operations that consume as much as 90% of staff time and resources http://www.ngs.noaa.gov/INFO/NGS10yearplan.pdf

  6. 10 Year Plan Update • Target release date: January 30th, 2013 • Public review period: July 30th – August 30th • Four strategic goals and one enterprise goal • Support the users of the NSRS • Modernize and improve the NSRS • Expand the NSRS stakeholder base through partnerships, education, and outreach • Develop and enable a workforce with a supportive environment • Enterprise: Improve organizational and administrative functionality

  7. New Datum Managers Joe Evjen Geometric Datum Project Manager 301-713-3194, x109 Joe.evjen@noaa.gov Mark Eckl Geopotential Datum Project Manager 301-713-3215, x117 Mark.eckl@noaa.gov

  8. Focus Areas within NGS • Infrastructure • Models and Tools • Outside Capacity Building

  9. Infrastructure • Quality check data that is incorporated in the NGS database • OPUS DB and Projects change how NGS accepts geodetic control into the NSRS • Encourage use of active control over passive control, especially in dynamic areas • Enable access to new datum through precise leveling when sub-cm relative heights needed

  10. Infrastructure • Enable positioning consistent with NSRS – e.g. Real Time Networks • Improve “timeliness” of coordinates on datasheets • Re-observe/Readjust – special case projects, gravity • Model motion, develop tools – monitor with CORS, satellite gravity • Metadata: Epochs, reliability scale, i.e. “Expiration date” on coordinates

  11. Old Datasheet

  12. New Datasheet 1 National Geodetic Survey, Retrieval Date = AUGUST 16, 2012 DJ8579 *********************************************************************** DJ8579 HT_MOD - This is a Height Modernization Survey Station. DJ8579 DESIGNATION - 40+00 DJ8579 PID - DJ8579 DJ8579 STATE/COUNTY- MS/YALOBUSHA DJ8579 COUNTRY - US DJ8579 USGS QUAD - COURTLAND (1983) DJ8579 DJ8579 *CURRENT SURVEY CONTROL DJ8579 ______________________________________________________________________ DJ8579* NAD 83(2011) POSITION- 34 09 03.57104(N) 089 54 20.86192(W) ADJUSTED DJ8579* NAD 83(2011) ELLIP HT- 62.697 (meters) (06/27/12) ADJUSTED DJ8579* NAD 83(2011) EPOCH - 2010.00 DJ8579* NAVD 88 ORTHO HEIGHT - 89.10 (meters) 292.3 (feet) GPS OBS DJ8579 ______________________________________________________________________ DJ8579 NAVD 88 orthometric height was determined with geoid model GEOID03 DJ8579 GEOID HEIGHT - -26.37 (meters) GEOID03 DJ8579 GEOID HEIGHT - -26.36 (meters) GEOID12 DJ8579 NAD 83(2011) X - 8,687.763 (meters) COMP DJ8579 NAD 83(2011) Y - -5,283,919.098 (meters) COMP DJ8579 NAD 83(2011) Z - 3,560,354.617 (meters) COMP DJ8579 LAPLACE CORR - -0.62 (seconds) DEFLEC09 DJ8579 Move ell ht and epoch info into top box, add datum tags Note when GPS Ortho Ht computed with previous geoid model, and provide that model ht http://www.ngs.noaa.gov/web/news/Datasheet_Format_Change.shtml

  13. DJ8579 FGDC Geospatial Positioning Accuracy Standards (95% confidence, cm) DJ8579 Type Horiz Ellip Dist(km) DJ8579 ------------------------------------------------------------------- DJ8579 NETWORK 0.41 0.71 DJ8579 ------------------------------------------------------------------- DJ8579 MEDIAN LOCAL ACCURACY AND DIST (016 points) 0.51 0.74 37.87 DJ8579 ------------------------------------------------------------------- DJ8579 NOTE: Click here for information on individual local accuracy DJ8579 values and other accuracy information. DJ8579 DJ8579 DJ8579.The horizontal coordinates were established by GPS observations DJ8579.and adjusted by the National Geodetic Survey in June 2012. DJ8579 DJ8579.NAD 83(2011) refers to NAD 83 coordinates where the reference DJ8579.frame has been affixed to the stable North American tectonic plate. See DJ8579.www.ngs.noaa.gov/web/surveys/NA2011 for more information. DJ8579 DJ8579.The horizontal coordinates are valid at the epoch date displayed above DJ8579.which is a decimal equivalence of Year/Month/Day. DJ8579 DJ8579.The orthometric height was determined by GPS observations and a DJ8579.high-resolution geoid model using precise GPS observation and DJ8579.processing techniques. DJ8579 Better way to quantify accuracies Local accuracies on request

  14. National Geodetic Survey, Retrieval Date = AUGUST 19, 2012 DJ8579 ******************************************************************** DJ8579 ACCURACIES - Complete network and local accuracy information. DJ8579 HT_MOD - This is a Height Modernization Survey Station. DJ8579 DESIGNATION - 40+00 DJ8579 PID - DJ8579 DJ8579 DJ8579 Statistical Information, in cm, for point DJ8579 follows. DJ8579 DJ8579 Note that Horz and Ellip values are the official 95% DJ8579 FGDC accuracy standards. The values of StdN, StdE and Stdh are the DJ8579 standard deviations (one sigma) of the coordinates (NETWORK) or DJ8579 of the difference in the coordinates (LOCAL) in Latitude, Longitude DJ8579 and Ellipsoid Height. The value CorrNE is the correlation DJ8579 coefficient between the latitude and longitude components of either DJ8579 the coordinate (NETWORK) or coordinate difference (LOCAL). DJ8579 DJ8579 Type/PID Horz Ellip Dist(km) StdN StdE Stdh CorrNE DJ8579 ------------------------------------------------------------------- DJ8579 NETWORK 0.41 0.71 0.00 0.18 0.15 0.36 -0.03351392 DJ8579 ------------------------------------------------------------------- DJ8579 LOCAL: DJ8579 DJ8605 0.80 0.45 3.83 0.33 0.32 0.23 +0.01508681 DJ8579 DJ8606 0.74 0.49 4.17 0.33 0.27 0.25 +0.12974978 DJ8579 DJ8607 1.46 0.86 8.17 0.61 0.58 0.44 +0.08505534 DJ8579 AJ7796 0.42 0.73 22.17 0.19 0.15 0.37 +0.03075219 DJ8579 CG3895 0.49 0.82 30.15 0.22 0.18 0.42 +0.07967025 DJ8579 EH3091 0.46 0.76 36.49 0.20 0.17 0.39 -0.03318633 DJ8579 DJ1445 0.51 0.78 36.70 0.22 0.20 0.40 -0.05498833 DJ8579 DJ8578 0.55 0.80 37.68 0.24 0.21 0.41 -0.06819426 DJ8579 EH2740 0.51 0.86 38.06 0.22 0.20 0.44 -0.01962507 DJ8579 DF7963 0.42 0.71 40.44 0.19 0.15 0.36 +0.02929858 DJ8579 DJ8577 0.55 0.90 47.18 0.24 0.21 0.46 -0.04102699 DJ8579 DI1690 0.38 0.63 61.56 0.16 0.15 0.32 -0.05282479 DJ8579 DJ8580 0.50 0.73 70.55 0.23 0.17 0.37 -0.03988712 DJ8579 EH0125 0.46 0.71 72.40 0.21 0.16 0.36 -0.06763601 DJ8579 DH3870 0.61 1.16 72.47 0.26 0.24 0.59 -0.04580132 DJ8579 DI1868 0.43 0.71 88.66 0.19 0.16 0.36 -0.00152101 DJ8579 DJ8579 MEDIAN 0.51 0.74 37.87 DJ8579 -------------------------------------------------------------------

  15. Changes to NGS Datasheet • 1 National Geodetic Survey, Retrieval Date = AUGUST 16, 2012 • AB3306 *********************************************************************** • AB3306 FBN - This is a Federal Base Network Control Station. • AB3306 DESIGNATION - MOBILE POINT • AB3306 PID - AB3306 • AB3306 STATE/COUNTY- AL/BALDWIN • AB3306 COUNTRY - US • AB3306 USGS QUAD - FORT MORGAN (1982) • AB3306 • AB3306 *CURRENT SURVEY CONTROL • AB3306 ______________________________________________________________________ • AB3306* NAD 83(2011) POSITION- 30 13 36.45583(N) 088 01 21.76600(W) ADJUSTED • AB3306* NAD 83(2011) ELLIP HT- -24.343 (meters) (06/27/12) ADJUSTED • AB3306* NAD 83(2011) EPOCH - 2010.00 • AB3306* NAVD 88 ORTHO HEIGHT - **(meters) **(feet) NOT PUB • AB3306 **This station is located in a suspected subsidence area (see below). • AB3306 ______________________________________________________________________ • AB3306 . . . • AB3306 • AB3306 ** This station is in an area of known vertical motion. If no • AB3306 ** orthometric height is shown in the current survey control section, • AB3306 ** all orthometric heights are considered suspect and are only • AB3306 ** available in the superseded section if suspect heights were • AB3306 ** requested. • AB3306

  16. Models/Tools • Models • Geoid: 1-cm; GRAV-D; strategy for monitoring • HTDP: Partner with Scripps, UAF • VTDP: Repeat surveys in Gulf Coast, subsidence monitoring in Harris-Galveston Coastal Subsidence District • Tools • Online Geodetic tool kit • LOCUS • OPUS S, RS, DB, Projects • Transformations: Vdatum, new transformation: HARN to 2007 to 2011

  17. Outreach and Outside Capacity Building Leveling – Spokane, 2006 • State Geodetic Advisor Program • Forums, workshops • Conferences • Training, capacity building www.ngs.noaa.gov/corbin/index.shtml

  18. NGS Height Modernization Web Site

  19. Questions Renee Shields Height Modernization Manager 301-713-3231, x116 Renee.Shields@noaa.gov www.ngs.noaa.gov/heightmod

More Related