Mid-Atlantic Chapter of the Urban and Regional Information Systems Association

MAC URISA 2018 Conference
MAC URISA 2018 Keynote Speaker

"NAD-WHAT? Choose wisely or your data may suffer"

Dan Martin
Northeast Regional Geodetic Advisor
NOAA/NOS/National Geodetic Survey

In 2022, the National Geodetic Survey will be replacing the U.S. horizontal and vertical datums (NAD 83 and NAVD 88). We will discuss the history of these datums, their relationship to other reference frames, the reasons for the change, and how it affects positioning professionals and their use of these datums. We will spot light how good coordinates can go really bad, without proper planning. The amount of data, how data is used and the type of data users have exponential increased since the NAD 27 to NAD 83 conversion, which has also increased the potential for introducing error.

About Dan

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 Spatial Reference System, and provides liaison between the National Geodetic Survey and the States of ME, NH, VT, MA, CT, RI, NY, and NJ, as well as other federal agencies. He worked in the Route Survey and Geodetic Survey sections of the Vermont Agency of Transportation from 1988 through 2003, and held the position of Geodetic Program Supervisor for the Agency from 1999 through 2003. In 2003 Dan began his career with the National Geodetic Survey as the Vermont State Geodetic Advisor. Dan is a Past President and Fellow Member of the American Association for Geodetic Surveying (AAGS), he is also a member of the Vermont Society of Land Surveyors and the New Hampshire Land Surveyors Association.

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