Eric Fischer, a photographer, has done his own analysis of geotagged maps on Flickr with his The Geotaggers’ World Atlas. Over fifty major cities are represented in his set. On top of OpenStreet base maps, Fischer used perl scripts to identify and plot the clusters of locations. The lines show the direction the photographer moved after taking the photo and the colors indicate the likely mode of transportation; black is walking, red is bicycling, green is via vehicle.
Fischer also did some mapping that separates out which photos were taken by tourists and which photos were taken by locals.
Ahti Heinla’s love of travel extended to creating a heat map of “World Touristiness” based on an analysis of uploaded photos on Panoramio. You can view the touristiness map in Google Maps or download the KML file from Heinla’s site. Heinla also makes available the Python script used to create the overlay.