Istituto di Scienza e Tecnologie dell'Informazione     
Rinzivillo S., De Lucca Siqueira F., Gabrielli L., Renso C. Where have you been today? Annotating trajectories with DayTag. In: SSTD 2013 - Advances in Spatial and Temporal Databases. 13th International Symposium (Munich, Germany, 21-23 August 2013). Proceedings, pp. 467 - 471. Mario A. Nascimento, Timos Sellis, Reynold Cheng, Jörg Sander, Yu Zheng, Hans-Peter Kriegel, Matthias Renz, Christian Sengstock (eds.). (Lecture Notes in Computer Science, vol. 8098). Springer, 2013.
Traditionally, the information about human mobility behav- ior, called diary, is acquired from volunteers by means of paper-and- pencil surveys. These diaries, representing the mobile activities of indi- viduals, are semantically rich, but lack in spatial and temporal precision. An alternative way is collecting diaries by annotating with activities the GPS tracks of individuals. This is more accurate from a spatio-temporal point of view, but the manual annotation becomes a burdensome work for the user. The tool we propose, called DayTag, is designed as a per- sonal assistant to help an individual to reconstruct her/his diary from the GPS tracks collected by a smartphone. The user interacts through the software to visualize and annotate the trajectories, thus resulting in a simple way to get user diaries.
Subject annotating trajectories, semantic trajectories

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