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Aeroradiometric grids for North America

Gridded data generated by aerial sensing of radiation emanating from the earth's surface provides general estimates of the geographic distribution of Uranium, Thorium, and Potassium in surficial and bedrock units. Covers the conterminous United States, southeastern Canada, and most of Alaska, but there are gaps in northern Québec, western Canada, and north central Alaska

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radiometric.kmz (Includes U, Th, K, and absorbed dose 1k byte)

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https://mrdata.usgs.gov (WMS, version 1.3.0)

https://mrdata.usgs.gov (WFS, version 1.1.0)

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