NOAA’s National Geodetic Survey (NGS)

1. NOAA’s National Geodetic Survey (NGS) Report to National States Geographic Information Council October 2009, Cleveland, OH John Ellingson, State Geodetic Advisor

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

3. National Spatial Reference System“NSRS” 1,558,321 survey marks (stations) in the NGS database on 9/22/09- includes CORS stations Foundation of all surveying, mapping, charting and positioning activities in the United States and Territories

4. NAD83 (NSRS2007) adjustment Properly aligns states Tied to National CORS network ~68,000 stations used – ~284,000 GPS vectors used ****Final report released in April 2009**** NOAA Technical Report NOS NGS 60 NAD83 (NSRS2007) http://www.ngs.noaa.gov/PUBS_LIB/NSRS2007/ FinalReports.shtml

5. New GEOID09 model released 9/22/09 GEOID: The equipotential surface of the Earth’s gravity field which best fits global mean sea level. Last NGS model for CONUS was published in 2003, (2006 for Alaska) Better model because of (NSRS2007) readjustment Better model because of additional data points.

6. Control Used to Develop GEOID09

7. National Geodetic Survey’s - CORSContinuously Operating Reference Stations Network of GNSS receivers – only accepted by NGS after passing very detailed review Coordinates of all CORS are computed daily by NGS and made available to the public by easily available charts, spreadsheets and data files. Archived data is available from NGS website back to 1994

8. NGS CORS Network ~1,300 stations in network – March 2009 Currently adding approximately 200 per year. More than 200 organizations participate in CORS program.

10. Obtain CORS Observation Files From NGS

11. Online Positioning Users Service“OPUS” You submit your GPS observations to NGS and OPUS computes the positions for you. Several “flavors” of OPUS: OPUS (the original)- OPUS-RS- OPUS DB- OPUS Projects-

12. Opus Submittal Page – NGS Website

14. Lidar for the Nation

16. WisconsinHeight ModernizationHoriz. & Vert. Control Started 10 years ago-before GRAV-D program $18 million to reach this point Available right now….no waiting 8 years for the GRAV-D results

17. What are NGS Products Worth to Society?January 2009 Socio-economic Scoping Study $758 million- annual value of CORS network & OPUS $282 million- estimated annual value of GRAV-D, if available today. $2.4 billion- annual value of National Spatial Reference System (NSRS)

18. NGS 10 Year Plan- Big Changes Ahead? Visit the NGS website and view the current plan. http://www.ngs.noaa.gov/INFO/tenyearfinal.shtml

19. NGS- State Advisor Program

20. Questions or Comments www.ngs.noaa.gov John Ellingson John.ellingson@noaa.gov 608-516-1382