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"OpenStreetMap contributors"
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USGS GIS data of the United States water resources maps, soil, hydrology, and weather. Contains multiple links to useful and informative websites.
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View within SubmissionGathering Resources...From the site: "This report describes new digital maps delineating areas of the United States, including Puerto Rico and the U.S. Virgin Islands, having karst or the potential...-
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View within SubmissionGathering Resources...USGS map of surficial deposits across the eastern half of the United States. Various downloadable versions of the map are available.-
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View within SubmissionGathering Resources...From the site: "A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b)."-
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View within SubmissionGathering Resources...From the site: "The Geographic Information Retrieval and Analysis System (GIRAS) was developed in the mid 70s to put into digital form a number of data layers which were of...-
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View within SubmissionGathering Resources...From the site: "This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as...-
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View within SubmissionGathering Resources... -