Post on 29-Nov-2014
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transcript
Now & the Future of Geodesy in Hawaii for the GIS Users
Edward E. Carlson
Pacific Region Geodetic Advisor
NOAA’s National Geodetic Survey
Outline
State of Hawaii
Vertical Network Real Time Reference Network
National Geodetic Survey
National Adjustment of 2011 Geometric Datum 2022 NGS Tool Kit
• 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
Oahu - Existing Benchmarks
Oahu - Proposed Level Network
Maui - Existing Benchmarks
Maui - Proposed Level Network
Kauai - Existing Benchmarks
Kauai - Proposed Level Network
Big Island - Existing Benchmarks
Big Island - Proposed Level Network
Lanai - Proposed Level Network
Molokai - Proposed Level Network
• 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
Phase 2 – CORS & VRS
• 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.
• 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
Better Positions and
Improved Access to the
National Spatial Reference System
The National Adjustment of 2011
National Geodetic Survey Announces
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)
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
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
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
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
Geometric Datum of 2022
NGS TOOL KIT
“ALL PAU”
Any Final Questions
Edward E. Carlson
National Geodetic Survey
808-532-3205
ed.carlson@noaa.gov