Georgia Institute of Technology
Given a set of query locations and a set of query keywords, a Trajectory Cover (CT) query over a repository of mobile trajectories returns a minimal set of trajectories that maximally covers the query keywords and are also spatially close to the query locations. Processing CT queries over mobile trajectories requires substantially different algorithms than those for location range queries. The main contributions of this paper are three-fold. The authors introduce a notion of Trajectory Cover that enables mobile users to get most relevant trajectories of their interest to plan their route of travel.