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"OpenStreetMap contributors"
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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 dataset and the accompanying Data Series report was created to assist in analysis and interpretation of water-quality data provided by the U.S. Geological...-
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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...Ground water levels for the United States.-
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View within SubmissionGathering Resources...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... -