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Read Me File For Plate II and Associated GIS Layers*:
Airborne Radioactivity Coverage of Vermont
(This read me file written by: Jonathan Kim, Vermont Geological Survey, August 2002)

NURE Flight Lines with Buffers Data Layer


Required files: flinrbuff1.dbf, flinrbuff1.shp, flinrbuff1.shx

        GIS coverage of flight lines with buffers from airborne Texas Instruments radiometric survey completed for the U.S. Dept. of Energy, National Uranium Resource Evaluation (NURE) in 1976. The thickness of the flight lines with buffers indicates the approximate ground surface area that was surveyed by the flights. Each line is approximately 1250 m wide and this value was obtained by averaging the widths of the airborne anomalies shown on the NURE Airborne data maps. This survey covered all but the northeastern most part of Vermont. This data was scanned from 1:250,000 scale paper maps in the Vermont Geological Survey archives. The map was scanned into a tiff file using Truinfo software and a Titan scanner, converted to a dbf file using Evscan software, converted to an Arcinfo coverage using PC Arcinfo, and georectified and digitized in PC Arcinfo. Buffers to the flight lines were added in Arcview 3.2a.

Geodetic Information NAD 83 Vermont Stateplane coordinates (Zone 5526) in meters

Reference:
Texas Instruments, 1976, Airborne Geophysical Survey of a Portion of New England, U.S. Energy Research and Development Administration Open File Report GJO-1666-1, 73 p.

Popenoesurveyedarea Data Layer


Required Files: popenoesurveyedarea.dbf, popenoesurveyedarea.shp, popenoesurveyedarea.shx

        GIS coverage of area of Vermont covered by U.S. Geological Survey airborne geophysical survey (modified from Popenoe, 1964). This data was scanned from a 1:250,000 scale paper map in the Vermont Geological Survey archives. The data was scanned into a tiff file using Truinfo software and a Titan scanner, georectified using ERDAS Imagine, and digitized using Arcview 3.2a.

Geodetic Information NAD 83 Vermont Stateplane coordinates (Zone 5526) in meters

Reference:
Popenoe, P., 1964, Aeroradioactivity of parts of east-central New York and west-Central New England, U.S. Geological Survey Geophysical Investigations Map GP-358, scale- 1:250,000.

This coverage was digitized from original 1:250,000 scale maps and data and, therefore, use at this scale is recommended. Accuracy may diminish when enlarged beyond this scale.

The only way to determine with certainty if groundwater from a particular well has elevated radionuclide levels is to have the water tested by a certified lab. The Vermont Department of Health recommends that all private well owners test their wells for naturally-occurring alpha radiation every 5 years http://healthvermont.gov/enviro/ph_lab/water_test.aspx#two. This map should not be used as a replacement for detailed, site-specific studies by competent technical personnel.

This map (and the other eight maps in this series) displays geological and geophysical data compiled from surveys conducted at various times over several decades. The information used in preparing the map(s) represents the best data possessed by the Vermont Agency of Natural Resources at the time of production. The data is subject to revision at any time and the map user should contact the Vermont Agency of Natural Resources to determine whether there have been any changes in the data on which the map was based.

Although every effort has been made to faithfully portray the information from the surveys, the Agency of Natural Resources cannot vouch for the accuracy of the data on which the map(s) was based. No warranty as to the accuracy or the usefulness of the data on the map(s) is expressed or implied.

*GIS Data available from Vermont Geological Survey, 103 South Main Street, Waterbury, Vermont 05671, 802/241-3608

VT DEC Geology and Mineral Resources Division 1 National Life Drive, Davis 2  Montpelier, VT 05620-3902 
Telephone: 802-522-5210 

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