G34B:
Scientific and Practical Challenges of Replacing NAD 83, NAVD 88, and IGLD 85 II (Half Session)

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Session ID#: 16028

Session Description:
In 2022, all datums of the United States, collectively referred to as the National Spatial Reference System (NSRS), will be replaced with modern one(s) that are continental in scope. However, significant scientific and practical challenges remain unresolved. Papers are invited that address some of these issues, including (1) defining a geocentric reference system fixed to a moving and deforming continent, (2) defining a geoid-based, continental-wide vertical datum, (3) implementing time dependencies including geoid change, (4) creating accurate transformations, (5) defining the role of private RTK networks, (6) determining dynamic heights, (7) building geospatial databases capable of handling historic static data along with modern time-dependent data, and (8) collaborations with neighboring countries to ensure compatible and seamless reference systems across the continent. Overhauling the NSRS in the U.S. and those of neighboring countries requires a comprehensive approach to resolving these and related issues over the next 6 years.
Primary Convener:  Dru A Smith, NOAA Natl Geodetic Survey, Silver Spring, United States
Convener:  Michael Craymer, Natural Resources Canada, Canadian Geodetic Survey, Ottawa, ON, Canada
Chairs:  Michael Craymer, Natural Resources Canada, Canadian Geodetic Survey, Ottawa, ON, Canada and Dru A Smith, NOAA Natl Geodetic Survey, Silver Spring, United States
OSPA Liaison:  Dru A Smith, NOAA Natl Geodetic Survey, Silver Spring, United States
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
1214 Geopotential theory and determination [GEODESY AND GRAVITY]
1229 Reference systems [GEODESY AND GRAVITY]
1295 Integrations of techniques [GEODESY AND GRAVITY]

Abstracts Submitted to this Session:

Modernizing the National Spatial Reference System (184209)
Dru A Smith, NOAA Natl Geodetic Survey, Silver Spring, United States
Fixing a Reference Frame to a Moving and Deforming Continent (Invited) (145321)
Geoffrey Blewitt, Nevada Geodetic Laboratory, Nevada Bureau of Mines and Geology, University of Nevada - Reno, Reno, NV, United States, Corne Kreemer, Nevada Bureau of Mines and Geology, University of Nevada - Reno, Reno, NV, United States and William C Hammond, University of Nevada, Reno, Nevada Geodetic Laboratory, Nevada Bureau of Mines and Geology, Reno, NV, United States
CGVD2013: The Geoid-based Vertical Datum in Canada (Invited) (177903)
Marc Veronneau1, Jianliang Huang2 and Catherine Margaret Isabelle Robin1, (1)Natural Resources Canada, Ottawa, ON, Canada, (2)Canadian Geodetic Survey, SGB, Natural Resources Canada, Ottawa, ON, Canada
Plan for Long-Term Monitoring of North American Geoid Change in Support of the U.S. National Spatial Reference System (175491)
Theresa Damiani, NOAA, National Geodetic Survey, Silver Spring, MD, United States

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