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“Billions of photos have been uploaded to the internet, and by that are considered a valuable source for data mining. Many of the photos are tagged with text descriptions to allow search. Information on popular cameras can easily be obtained. But even more exciting is the geo-information which specifies the specific world location of the photo taken. Considering the fact that Flickr alone carries over one hundred million geotagged photos (out of a total of 3 billion photos) – research is starting to be meaningful. This is what driven David Crandall and colleagues at Cornell University in Ithaca, New York, to analyze the data attached to 35 million photographs uploaded to the Flickr website to create accurate global and city maps and identify popular snapping sites.
The enormous dataset provides a global picture of

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