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United States Geological Survey (USGS)  

koordinates.com/maps/usgs/

About United States Geological Survey (USGS)

A multi-disciplinary science organization that focuses on biology, geography, geology, geospatial information, and water.

Note: This is not an official webpage of the USGS.

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  This account lists official maps and data from United States Geological Survey (USGS).
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