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Hawaii Pacific GIS Conference 2012: Survey and Positioning - Now and Future of Geodesy in Hawaii for the GIS User
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Hawaii Pacific GIS Conference 2012: Survey and Positioning - Now and Future of Geodesy in Hawaii for the GIS User

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  • 1. Now & the Future of Geodesy in Hawaii for the GIS Users Edward E. Carlson Pacific Region Geodetic Advisor NOAA’s National Geodetic Survey
  • 2. OutlineState of HawaiiVertical NetworkReal Time Reference NetworkNational Geodetic SurveyNational Adjustment of 2011Geometric Datum 2022NGS Tool Kit
  • 3. Hawaii DOT Height Modernization Plans• Phase 1 – Digital Leveling - First Order Class II using digital levels• Phase 2 – Continuous Operating Reference Stations (CORS) and Real Time Network (RTN)• Phase 3 – LIDAR and Airborne Gravity (NGS)• Phase 4 – Research and Development• Phase 5 – Reference Center Note: Phase 1 and 2 have been funded through CIP
  • 4. Oahu - Existing Benchmarks
  • 5. Oahu - Proposed Level Network
  • 6. Maui - Existing Benchmarks
  • 7. Maui - Proposed Level Network
  • 8. Kauai - Existing Benchmarks
  • 9. Kauai - Proposed Level Network
  • 10. Big Island - Existing Benchmarks
  • 11. Big Island - Proposed Level Network
  • 12. Lanai - Proposed Level Network
  • 13. Molokai - Proposed Level Network
  • 14. Estimated miles of leveling• Oahu – Estimate of 211 miles• Maui – Estimate of 251 miles• Kauai – Estimate of 128 miles• Big Island – Estimate of 410 miles Note: Data to be submitted to NGS to be included in National Spatial Reference System (NSRS)
  • 15. Phase 2 – CORS & VRS
  • 16. • GPS Receivers: – Current GNSS Receivers and Geodetic Antennas• Equipment: – Solar panels, backup batteries, battery enclosure box – Modem radio where no internet exist to provide a single base solution• Construction: – In Federal, State or County property where possible – Sites may change depending on site issues (high buildings, trees, transmission towers, mountains, etc.)• Servers – Central server with redundant server located in each county.
  • 17. VRS Network• Oahu - 7 Stations• Maui - 8 Stations with a possible 9th station• Kauai – 6 Stations• Big Island – 9 StationsNOTE 1: Will level to as many VRS stationsNOTE 2: Include at least 20% in the National CORS network system
  • 18. National Geodetic Survey Announces Better Positions and Improved Access to theNational Spatial Reference System The National Adjustment of 2011
  • 19. Introducing… NAD 83(2011) epoch 2010.00• Multi-Year CORS Solution (MYCS) – Reprocessed all CORS GPS data Jan 1994-Apr 2011 – 2264 CORS & global stations – NAD 83 computed by transformation from IGS08• National Adjustment of 2011 (NA2011) – New adjustment of GNSS passive control – GNSS vectors tied (and constrained) to CORS NAD 83(2011) epoch 2010.00 – Approximately 80,000 stations and 400,000 GNSS vectors• Realization SAME for CORS and passive marks• This is NOT a new datum! (still NAD 83)
  • 20. Why a new NAD 83 realization?• Previous NAD 83(CORS96) needed many improvements• NSRS improvements achieved with the MYCS include: – Consistent coordinates and velocities from combined solution – Aligned with most recent realization of global frame (IGS08) • IGS08 epoch 2005.0 (previous aligned at epoch 1997.0) • NAD 83 epoch 2010.0 (previous epochs of 2002.0 and 2003.0) – Major processing algorithm, modeling, metadata improvements – Absolute phase center antenna calibrations• Highly accurate and consistent CORS coordinates and velocities determined using Best Available Methods – Needed because CORS network is foundation of NSRS
  • 21. Datum Differences NAD83(PACP00) – NAD83(PA11) = 0.02m NAD83(PA11) - WGS84(ISG08) = 2.42m NAD83(PACP00) – WGS84(ITRF00) = 1.80m NAD83(PACP00) – NAD83(PA11) = 0.02m NAD83(PA11) - WGS84(ISG08) = 2.44m NAD83(PACP00) – WGS84(ITRF00) = 1.87m NAD83(PACP00) – NAD83(PA11) = 0.02m NAD83(PA11) - WGS84(ISG08) = 2.45m NAD83(PACP00) – WGS84(ITRF00) = 1.88m Hawaiian NAD83(PACP00) – NAD83(PA11) = 0.02m Islands NAD83(PA11) - WGS84(ISG08) = 2.47m NAD83(PACP00) – WGS84(ITRF00) = 1.91mNGA is doing a new definition of WGS84 in 2012
  • 22. Datum Differences NAD83(MARP00) – NAD83(MA11) = 0.08m NAD83(MA11) - WGS84(ISG08) = 1.13m NAD83(MARP00) – WGS84(ITRF00) = 1.05m NAD83(PACP00) – NAD83(PA11) = 0.16m NAD83(PA11) - WGS84(ISG08) = 3.05m NAD83(PACP00) – WGS84(ITRF00) = 2.45m NAD83(MARP00) – NAD83(MA11) = 0.03m NAD83(MA11) - WGS84(ISG08) = 1.23m NAD83(MARP00) – WGS84(ITRF00) = 1.15m
  • 23. Modernizing the NSRS Positioning America in a dynamically changing world• New Geopotential “Vertical” Datum• New Geometric “Horizontal” DatumEstimated completion date - 2022 www.geodesy.noaa.gov
  • 24. Geometric Datum of 2022
  • 25. NGS TOOL KIT
  • 26. “ALL PAU”Any Final Questions Edward E. Carlson National Geodetic Survey 808-532-3205 ed.carlson@noaa.gov

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