The United States from Eric Fisher's "See something or say something" map collection.
Eric Fischer (@enf) has mapped geotagged tweets and flickr pictures in a new collection called "See something or say something." He has posted the maps to, where else, his flickr page. Fischer's previous projects include "The Geotaggers' World Atlas" and other works and all can be found here:
In this new collection red (orange?) dots are locations of Flickr pictures. Blue dots are locations of tweets. White dots are locations that have been posted to both.
In the US map above you can see the dominance of images in the scenic western states, and the red on the Washington DC map below shows the National Mall from the dominance of the red geotagged flickr images. Blue tweets drape over much of the the rest of DC, no doubt this is all the cutting-edge policy thinking going on.
Nathan Yau, whose new book "Visualize This," is just out, writes about Fischer's new work at his blog, Flowing Data (@flowingdata).
Washington DC from Eric Fisher's "See something or say something" map collection.