Istituto di Scienza e Tecnologie dell'Informazione     
Ribeiro De Aquino A., Alvares L. O., Renso C., Bogorny V. Towards semantic trajectory outlier detection. In: GEOINFO 2013 - XIV Brazilian Symposium on Geoinformatics (San Paolo, Brasile, 24-27 November 2013 2013). Proceedings, pp. 115 - 126. Andre Santanche, Pedro R. Andrade. Simpósio Brasileiro de Geoinformática, 2013.
Only a few works in trajectory data mining have focused on outlier detection, and to the best of our knowledge, no works so far have made a deeper analysis to either understand or to give a meaning to the outliers. In this paper we present an algorithm to add meaning to trajectory outliers considering three main possible reasons for a detour: stops outside the standard route, events, and traffic jams in the standard path. We show with experiments on real data that the method correctly finds the different types of outliers.
Subject Semantic trajectories
Trajectory outlier
H.2.8 Database Applications

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