NGS Report

NGS Report

• 1.
  NOAA’s National GeodeticSurvey (NGS)Report toNational States Geographic Information CouncilOctober 2009, Cleveland, OHJohn Ellingson, State Geodetic Advisor
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  NGS MISSION To define, maintain and provide access to the National Spatial Reference System to meet our nation’s economic, social, and environmental needs.
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  National Spatial ReferenceSystem“NSRS”1,558,321 survey marks (stations) in the NGS database on 9/22/09- includes CORS stationsFoundation of all surveying, mapping, charting and positioning activities in the United States and Territories
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  NAD83 (NSRS2007) adjustmentProperlyaligns statesTied 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
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  New GEOID09 modelreleased 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) readjustmentBetter model because of additional data points.
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  Control Used toDevelop GEOID09
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  National Geodetic Survey’s- CORSContinuously Operating Reference StationsNetwork of GNSS receivers – only accepted by NGS after passing very detailed reviewCoordinates 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
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  NGS CORS Network~1,300stations in network – March 2009Currently adding approximately 200 per year.More than 200 organizations participate in CORS program.
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  Obtain CORS ObservationFiles From NGS
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  Online Positioning UsersService“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-
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  Opus Submittal Page– NGS Website
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  Gravity for theRedefinition of the American Vertical Datum = GRAV-D10 year program to develop a more accurately defined Geoid for North AmericaNew GRAV-D datum will replace NAVD88Orthometric Heights (“elevations” on maps) good to 2 cm (or better) using GNSS technologyGravity for the Nation benefits: Imagery for the Nation
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  Lidar for theNation
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  Elevation forthe NationGRAV-D DetailsTypical flying heightis 35,000 feet. Some missions flown aslow as 5,000 feet (rare) 10km x 40km blocks Est. total cost <$40 million, spread over 10 yrs
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  WisconsinHeight ModernizationHoriz. &Vert. ControlStarted 10 years ago-before GRAV-D program$18 million to reach this pointAvailable right now….no waiting 8 years for the GRAV-D results
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  What are NGSProducts 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)
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  NGS 10 YearPlan- Big Changes Ahead?Visit the NGS website and view the current plan.http://www.ngs.noaa.gov/INFO/tenyearfinal.shtml
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  NGS- State AdvisorProgram
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  Questions or Commentswww.ngs.noaa.govJohn[email protected]