G21B:
Scientific and Practical Challenges of Replacing NAD 83, NAVD 88, and IGLD 85 I Posters

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Session ID#: 12899

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:

Dynamic Heights in the Great Lakes at Different Epochs (120663)
Daniel R Roman, National Geodetic Survey, HQ, Silver Spring, United States
NADCON5: your tool for easy, consistent coordinate transformations (150345)
Andria L Bilich, NOAA National Ocean Service, Silver Spring, United States and Dru A Smith, NOAA Natl Geodetic Survey, Silver Spring, United States
New Datums for the Nation: Modernizing the United States National Spatial Reference System (134396)
William A Stone, NOAA's National Geodetic Survey, Santa Fe, NM, United States and Dana J Caccamise II, NOAA National Geodetic Survey, Silver Spring, MD, United States
Improved Modeling of Vertical Crustal Motion in Canada for a New North American Reference Frame (135807)
Catherine Margaret Isabelle Robin1, Michael Craymer2, Remi Ferland2, Earl Lapelle1, Mike Piraszewski2, Yanlai Zhao1 and Thomas S James3, (1)Canadian Geodetic Survey, Natural Resources Canada, Ottawa, ON, Canada, (2)Natural Resources Canada, Canadian Geodetic Survey, Ottawa, ON, Canada, (3)Geological Survey of Canada Sidney, Sidney, BC, Canada
Evaluation of the Horizontal and Vertical Accuracy of GNSS Survey Observations from a Real-Time Network (132293)
Mahsa Allahyari, Oregon State University, Corvallis, OR, United States, Michael J Olsen, Oregon State University, School of Civil and Construction Engineering, Corvallis, OR, United States, Daniel Gillins, Oregon State University, School of Civil and Construction Engineering, Corvallis, United States and Michael L Dennis, National Geodetic Survey, Silver Spring, United States
Support time-dependent transformations for surveying and GIS : current status and upcoming challenges (171746)
Daphne Lercier1, Sebastien Vielliard1, Nick Mein2, Hamid Mahmoudabadi3 and Graham Briggs3, (1)Trimble, Nantes, France, (2)Trimble Navigation Ltd, Christchurch, New Zealand, (3)Trimble, Corvalis, OR, United States
Small Modifications of Curvilinear Coordinates and Successive Approximations Applied in Geopotential Determination (189936)
Petr Holota, Research Institute of Geodesy, Topography and Cartography, Zdiby, Prague-East, Czech Republic and Otakar Nesvadba, Land Survey Office, Prague, Czech Republic
Directional kriging implementation for gridded data interpolation and comparative study with common methods (193326)
Hamid Mahmoudabadi and Graham Briggs, Trimble, Corvalis, OR, United States
Challenges of Replacing NAD 83, NAVD 88, and IGLD 85: Exploiting the Characteristics of 3-D Digital Spatial Data (125203)
Earl F Burkholder, Global COGO, Inc., Las Cruces, NM, United States

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