[Air-L] Flickr user traces make accidental maps

Gallery: Flickr user traces make accidental maps ? Colin Barras / New Scientist: Billions of photos have now been uploaded to the internet, and many are tagged with text descriptions. Some are even geotagged - stamped with the latitude and longitude coordinates at which the image was taken. -> http://www.newscientist.com/article/dn17017-gallery-flickr-user-traces-make-...