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Latest Developments in NGS NGS Products, Tools and Services

Latest Developments in NGS NGS Products, Tools and Services. Pamela Fromhertz Colorado State Geodetic Advisor National Geodetic Survey National Oceanic and Atmospheric Administration. PLSC Annual Survey Summit March 1, 2013. National Geodetic Survey Advisor Program.

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Latest Developments in NGS NGS Products, Tools and Services

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  1. Latest Developments in NGSNGS Products, Tools and Services Pamela Fromhertz Colorado State Geodetic Advisor National Geodetic Survey National Oceanic and Atmospheric Administration PLSC Annual Survey Summit March 1, 2013

  2. National Geodetic Survey Advisor Program

  3. National Geodetic Survey Mission To define, maintain and provide access to the National Spatial Reference System (NSRS) to meet our Nation’s economic, social and environmental needs. • Latitude • Longitude • Height • Scale • Gravity • Orientation • Time Variations Technology is Driving the Changes You See!

  4. Since Last Years Conference • Multi-Year CORS solution – 2011 - Completed • NAD 83 (2011) epoch 2010.0 - Completed • Geoid 12A -Completed • New Data Sheets – 2012 –Completed • National Adjustment (vertical) of GPS passive marks • Under consideration; This not adjusting the leveling network • Constrain vertically to NAVD 88 benchmarks • GNSS-derived orthometric heights • Adoption of new datums - • Geometric, could happen any time • Vertical, requires completion of GRAV-D

  5. Agenda • Datums • Improvements in the NSRS • NAD83 (2011) epoch 2010.0 Readjustment • Geoid12A/New Datums/GRAV-D/Heights • DS-World/DataSheets/Mark Recovery • CORS/OPUS • RTN • CBLs IMPROVEMENTS ADVANCEMENTS CHANGES

  6. Retirements • Dave Doyle, Chief Surveyor • Ronnie Taylor, Deputy Director, former FL Advisor • Gilbert Mitchell, Chief Geodetic Services Division • Renee Shields, HT MOD Program Manager • Curt Smith, MT/ID Advisor • Dave Minkel, AZ Advisor • Davey Crockett, Leveling Processing guru • Monroe Rivers, KS Advisor • ….

  7. http://www.ngs.noaa.gov/ geodesy.noaa.gov

  8. Geodetic Reference Surfaces A beachball globe Mathematical best fit to Earth’s surface… used for defining Latitude and Longitude Modeled best fit to “sea surface” equipotential gravity field used for defining Elevation

  9. Datums A mathematical and geometric concept that serves as a foundation or starting point for mapping, surveying, engineering based on realization of actual geospatial data points.

  10. Geodetic Datums • Horizontal • 2-D (Latitude and Longitude) (e.g. NAD 27, NAD 83 (1986)) • Vertical/Geopotential • 1-D (Orthometric Height) (e.g. NGVD 29, NAVD 88, Local Tidal) Geometric 3-D (Latitude, Longitude and Ellipsoid Height) Fixed and Stable(?) - Coordinates seldom change (e.g. NAD 83 (1993), NAD 83 (2007)) also 4-D (Latitude, Longitude, Ellipsoid Height, Velocities) Coordinates change with time (e.g. NAD 83, ITRF00, ITRF05)

  11. NGSNational Spatial Reference System(NSRS) Improvements TIME NETWORK LOCAL NETWORK SPAN ACCURACY ACCURACY . NAD 27 1927-1986 10 meter s (1 part in 100,000) NAD83(86) 1986-1990 1 meter (1 part in 100,000) NAD83(199x)* 1990-2007 0.1 meter B-order (1 part in 1 million) HARN A-order (1 part in 10 million) NAD83(NSRS2007) 2007 - 2011 0.01 meter 0.01 meter (CORS) NAD83(NSRS2011) 2011 - 0.01 meter 0.01 meter (CORS) * CO was completed and adjusted in 1992

  12. Source: Zurich-American Insurance Group Accurate positioning begins with accurate coordinates • Geodetic control (the NSRS) is the foundation for all geospatial products. Without Geodetic Control as a “base map” layer, GIS applications will not work properly

  13. GPS Receiver Grades • Recreational Grade • $100-$1000 1-10 meters • Mapping • $2,000-$6,000 submeter - 3 meter • Survey Grade • $10,000 + 5mm – 2 cm Federal Geospatial Summit

  14. 1000 m radius COMET 500 m radius Flagpole NAD83 Same point different datum's = different lat/long’s

  15. Datum Differences NAD 27 – NAD 83

  16. Datum Difference NGVD 29 – NAVD 88

  17. Are NAD 83 & WGS 84The Same?

  18. Are NAD 83 & WGS 84 The Same? NO but for your application is it significant? If requirements are greater than 3m then Yes If requirements are less than 3m then No Federal Register Notice: Vol. 60, No. 157, August 15, 1995, pg. 42146 “Use of NAD 83/WGS 84 Datum Tag on Mapping Products”

  19. State Plane Coordinates State plane coordinates are the projection of latitudes and longitudes northings eastings To a flat mapping surface that is usually defined by state law

  20. Plane Coordinate Conversion Tools State Plane Coordinates GPPCGP (NAD 27 only) SPCS83(NAD 83 only) http://www.ngs.noaa.gov/TOOLS/spc.shtml UTM UTMS (Both NAD 27 & NAD 83) http://www.ngs.noaa.gov/TOOLS/utm.shtml Both CORPSCON (Both NAD 27 & NAD 83) http://crunch.tec.army.mil/software/corpscon/corpscon.html www.ngs.noaa.gov www.geodesy.noaa.gov

  21. Metadata • For instance: • What is the Source of the Data? • What is the Datum/Adjustment Epoch? • What are the Field Conditions? • What Equipment was used, especially what Antenna? • What firmware was in the receiver and collector? • What redundancy, if any, was used?

  22. Legislation for NAD 83 and units * * Utah is now a U.S. Survey Foot State(Blue)

  23. NSRSNew Adjustment Federal Geospatial Summit

  24. NGS - RT Program Components NGS Streams Raw Data From The Backbone CORS Provide Outreach and Education Develop and Publish Guidelines Describing Best Practices. Research Scientific Research Affecting Accurate Real-Time Positioning. [satellite orbits, refraction, multipath, antenna calibration, and crustal motion.]

  25. CSRN • CSRN Board meetings • Thursday, April 18th, 2013, 5:30 to 7:00 pm.  Location to be determined • Thursday, September 19th, 2013, 5:30 to 7:00 pm.  LTBD • CSRN Membership meeting • Thursday, November 21st, 2013, 5:30 to 7:00 pm.  LTBD, topic and speaker to be selected • Events • Saturday, August 17th, 2013 – GPS Day.  LTBD • Sometime in August or September – CSRN and Northern PLSC Chapters Picnic – Theme, checking instrument calibration

  26. CBLs • June 10 and June 17 • Workshop (How to) • Re-Measure Highline • Training for Pam • Re-Measure Durango • ?? • New CBL in Denver Metro Area • Complete all other CBLs in 2014

  27. Ohio CBL http://digital.bnpmedia.com/publication/?i=143556&p=25 Feb 2013 POB

  28. CBLs

  29. NGS Training Center Webinars! http://www.ngs.noaa.gov/corbin/

  30. http://www.ngs.noaa.gov/ geodesy.noaa.gov IMPROVEMENTS Federal Geospatial Summit

  31. More information… NGS Home Page: http://www.geodesy.noaa.gov geodesy.noaa.gov CORS Webpage: http://www.ngs.noaa.gov/CORS/ CORS newsletter OPUS Webpage: http://www.ngs.noaa.gov/OPUS/ Find Your Advisor: www.ngs.noaa.gov/ADVISORS/AdvisorsIndex.shtml This presentation will be uploaded to: http://www.ngs.noaa.gov/web/science_edu/presentations_archive/ FAQs on the various webpages

  32. A Question to Consider: What is good enough with respect to the NSRS, i.e. have we reached a level of precision and accuracy where further realizations (adjustments) are unnecessary?

  33. How to Plan for the Future • Move to a contemporary realization of NAD 83 • Obtain precise ellipsoid heights on NAVD 88 bench marks (OPUS -DB) • Improves hybrid geoid models and provides “hard points” in new vertical datum • Move off of NGVD 29 to NAVD 88 • Understand the accuracy of VERTCON in your area • Move away from passive marks to GNSS • Especially move off of classical passive control • Require/provide complete metadata for all survey/mapping contracts • How did they get the positions/heights? • Survey Manual/Spatial Data Accuracy and Georeferencing Standards

  34. Next Steps/Priorities • CBL • OPUS-DB (Begin implementing) • Heights -Study

  35. CO State Geodetic Advisor New Office as of Jan 22, 2013 Denver Federal Center Bldg 810 Room 5014 (Colorado Federal Executive Board) 303-202-4580 Cell 240-988-6363 Pamela.fromhertz@noaa.gov • Geodesy.ngs.noaa.gov • http://www.ngs.noaa.gov/ADVISORS/AdvisorsIndex.shtml

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