Google engineer Nelson Minar’s river map of the continental US has a number of explorable vector-based versions and fully detailed renderings on Flickr.
You can read the technical details on his blog.
Explore the map
Once upon a time, in almost every city, many rivers flowed. Why did they disappear? How? And could we see them again? This documentary tries to find answers by meeting visionary urban thinkers, activists and artists from around the world. Written & Directed by Caroline Bâcle Produced by Katarina Soukup Catbird Films, Inc (Montreal, Canada) http://facebook.com/LostRiversDoc
Here is a trailer for what looks like a fascinating exploration of the relationship between urban centers and the rivers that once supported them.
"Once upon a time, in almost every city, many rivers flowed. Why did they disappear? How? And could we see them again? This documentary tries to find answers by meeting visionary urban thinkers, activists and artists from around the world."
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