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Here you will find map products for Wyoming and Montana related to water resources that lend visual identity to our data. The maps you find in this section were devised by U.S. Geological Survey scientists using Geographic Information Systems that help us interpret the data through spatial and geographic imagery.
The National Hydrography Dataset (NHD) represents the water drainage network of the United States with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages (map view).
The Watershed Boundary Dataset (WBD) is a seamless, national hydrologic unit dataset (map view). Simply put, hydrologic units represent the area of the landscape that drains to a portion of the stream network.