Eric Fischer’s Locals Vs. Tourists. Tourist destinations made visible through mass user generated data from the photograph network Flickr.

Blue points on the map are pictures taken by locals (people who have taken pictures in this city dated over a range of a month or more).

Red points are pictures taken by tourists (people who seem to be a local of a different city and who took pictures in this city for less than a month).

See Also: Pervasive, Boundary, Data