NEARC Fall 2015 has ended

Welcome to the technical sessions schedule for the 2015 Annual Fall NEARC Conference. 

 The technical schedule is capable of being sorted by date (i.e, Monday, Nov. 9) or track (i.e. USGS Hydro). You can also search for a presentation title (i.e. Harmonizing the NHD and WBD Datasets in Maine), key term (i.e. NHD), or presenter last name (i.e. O’Neil-Dunne). The sort and search functions can be found on the navigation panel on the right side of this page. If you hover over the "Schedule" button, you’ll also see different schedule view options (i.e. Grid or Simple). Try selecting each of them to see which view you prefer. 

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MAIN NEARC WEBSITE: Click here to return to the main NEARC conference website for poster abstracts, GIS Educators Day schedule, and full conference schedule at-a-glance. 

Monday, November 9 • 10:30am - 12:00pm
Journey to the Moving Center of the Earth - The Evolution of the National Spatial Reference System

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Daniel J. Martin, Northeast Regional Geodetic Advisor, NOAA/NOS/National Geodetic Survey

In 2022, NGS will be replacing the US horizontal and vertical datums (NAD 83 and NAVD 88). This workshop is designed to discuss the need and process for these changes, as well as how these changes may affect users and what users can do to help prepare for these changes. Our journey will begin with a brief discussion of the history of the North American Datum of 1983 and the North American Vertical Datum of 1988, their relationships to other reference frames, and the reasons for their ongoing evolution. As LiDAR is becoming much more prevalent within GIS products, we will also discuss the relationships of geoid models to various versions of NAD 83, and what can happen should these relationships be ignored.

avatar for Daniel Martin

Daniel Martin

National Geodetic Survey
Dan Martin works for the National Geodetic Survey and has been the Northeast Regional Geodetic Advisor since May of 2015. As the Regional Advisor, he instructs local surveyors, state and municipal agencies, and the geospatial community at large, on how to use and preserve the National... Read More →

Monday November 9, 2015 10:30am - 12:00pm
Green Mountain C

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