This 3D reconstruction of Dubrovnik, Croatia was made entirely by computers from photos sourced on Flickr. It contains 4,619 images and nearly 3.5 million 3D points.
This project is referenced by Victor Burgin in his keynote presentation at Urban Encounters: The Image of Public Space a seminar at Tate Britain in October 2012. Burgin's talk is at the beginning of the podcast embedded below:
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