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News Link • Geography

Trace Any U.S. Waterway Upstream, Downstream, Sidestream

• http://www.popsci.com, By Shaunacy Ferro
 Remember this map of all the waterways in the U.S. from earlier this summer? Now there's something even more fun: An interactive app that lets you not only see the waterways, but trace them to their source (or to their end, if it suits you better).

Streamer, a visualization from the National Atlas, shows almost all the streams in the U.S., or at least the ones large enough to see at a one to 1 million scale, meaning each inch of map corresponds to about 15.8 miles of land.

It gives you a look at how far water travels from some sources, and how short a distance another nearby waterway might stretch. There's something especially satisfying about clicking a stream that dumps into a million different veins of water, or shoots its way across multiple states to empty into the ocean. Case in point: Hitting the coronary artery of American waterways, the Mississippi River, illuminates connections over the entirety of the middle of the country:

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