Aeroradiometric Surveys of North America

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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  TIFF image	dimensions	size	TFW	Thumbnail
  Color composite	5823 x 2371	40M	tfw	PNG, 111kb
  Potassium	5828 x 2444	41M	tfw	PNG, 66kb
  Thorium	5865 x 2480	42M	tfw	PNG, 66kb
  Uranium	5868 x 2432	41M	tfw	PNG, 66kb
  Absorbed dose	5839 x 2456	41M	tfw	PNG, 66kb