hawaii pacific gis conference 2012: survey and positioning - now and future of geodesy in hawaii for...
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Now & the Future of Geodesy in Hawaii for the GIS Users
Edward E. Carlson
Pacific Region Geodetic Advisor
NOAA’s National Geodetic Survey
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Outline
State of Hawaii
Vertical Network Real Time Reference Network
National Geodetic Survey
National Adjustment of 2011 Geometric Datum 2022 NGS Tool Kit
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• 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
Hawaii DOT Height Modernization Plans
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Oahu - Existing Benchmarks
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Oahu - Proposed Level Network
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Maui - Existing Benchmarks
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Maui - Proposed Level Network
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Kauai - Existing Benchmarks
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Kauai - Proposed Level Network
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Big Island - Existing Benchmarks
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Big Island - Proposed Level Network
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Lanai - Proposed Level Network
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Molokai - Proposed Level Network
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• 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)
Estimated miles of leveling
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Phase 2 – CORS & VRS
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• 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.
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• Oahu - 7 Stations • Maui - 8 Stations with a possible 9th station • Kauai – 6 Stations • Big Island – 9 Stations
NOTE 1: Will level to as many VRS stations NOTE 2: Include at least 20% in the National CORS
network system
VRS Network
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Better Positions and
Improved Access to the
National Spatial Reference System
The National Adjustment of 2011
National Geodetic Survey Announces
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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)
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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
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Hawaiian Islands
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
NAD83(PACP00) – NAD83(PA11) = 0.02m NAD83(PA11) - WGS84(ISG08) = 2.47m NAD83(PACP00) – WGS84(ITRF00) = 1.91m
NGA is doing a new definition of WGS84 in 2012
Datum Differences
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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
Datum Differences
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Positioning America in a dynamically changing world
• New Geopotential “Vertical” Datum
• New Geometric “Horizontal” Datum
Estimated completion date - 2022
www.geodesy.noaa.gov
Modernizing the NSRS
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Geometric Datum of 2022
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NGS TOOL KIT
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“ALL PAU”
Any Final Questions
Edward E. Carlson
National Geodetic Survey
808-532-3205