Tracing the Visitor's Eye

So far the investigation of spatio-temporal patterns of people mainly rendered a quantitative understanding of the city. In our study, we intend to leverage implicit spatio-temporal data (i.e. latitude, longitude and timestamp) with the richness of people-generated information. Our approach is to consider that uploading, tagging and disclosing the location of a photo can be interpreted as an act of communication rather than a pure implicit history of physical presence. For this purpose, we retrieved from Flickr, large amounts of photo taken by thousands of users in the world’s most photographed cities. Based on the time, explicit location and people’s description of their photos, we design geovisualizations. They reveal patterns of tourists and citizens consuming a city, such as the flow of people between city attractions (see figures below), the monuments areas of influence or what is happening with day/night and working/weekend periodicity. As a result, we are

• evaluating the potential of using people-generated geotagged information to contribute urban understanding.
• studying how people explicitly position and disclose spatio-temporal information in order to understand their use and need of quality of location information in a urban space.
  

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