Streamer is a new interactive, online map service from the United States Geological Survey and the National Atlas of the United States that allows the user to navigate America’s major rivers and streams. Using digital hydrographic data at one million-scale (1 inch = 15.8 miles), Streamer allows the user to trace any stream or river upstream and downstream from any point along its course. It allows for the creation of concise or detailed reports of the upstream and downstream traces of any particular stream or river, making it a useful tool for community planners and policy makers. With Streamer, any policy or planning decision can now more easily contain information on upstream or downstream impacts.

Streamer also allows the user to locate areas of interest by entering latitude and longitude coordinates, specifying stream or place names, or entering a USGS stream flow gauge identification number. The user can also print out maps of upstream and downstream traces, identify streams and water bodies by clicking on them, learn about current or historic streamflow at thousands of locations, and collect other useful information.

Interactive maps and further information can be found on the official website.