For the geotaggers / data visualisation fans out there

London really does lend itself well to all the new mapping and data visualising technologies that clever developers keep bringing out. Here is a beautiful map of London done by Eric Fischer using geotagged photos from Flickr and Picasa:

Eric Fischer determined the speed at which photographers travelled the various urban landscapes by analyzing their photos' timestamps and geotags, and plotting them on an OpenStreetMap background layer. The maps are ordered by the number of pictures taken in the central cluster of each city, and include various metropolises like New York, London, Paris, San Francisco, Tokyo, Berlin, Rome, Barcelona, Vancouver, and Hong Kong.

He has lots more cities in his Geotaggers' World Atlas set on Flickr.