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