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Hydrography -- United States.

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View Resource National Hydrography Dataset (NHD)

Spearheaded by the US Environmental Protection Agency (EPA) and the US Geological Survey (USGS), the National Hydrography Dataset (NHD) is "a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities." The dataset is useful in the creation of maps, in geocoding observations...

https://nhd.usgs.gov/