OLAP for Trajectories

In this paper, we present an OLAP framework for trajectories of moving objects. We introduce a new operator GROUP TRAJECTORIES for group-by operations on trajectories and present three implementation alternatives for computing groups of trajectories for group-by aggregation: group by overlap, group by intersection, and group by overlap and intersection. We also present an interactive OLAP environment for resolution drill-down/roll-up on sets of trajectories and parameter browsing. Using generated and real life moving data sets, we evaluate the performance of our GROUP TRAJECTORIES operator.

• Type: Conference
• Year: 2008
• Where: DEXA
• Authors: Oliver Baltzer, Frank K. H. A. Dehne, Susanne E. Hambrusch, Andrew Rau-Chaplin
• Keywords: Database, DEXA 2008, GROUP TRAJECTORIES, Operator Group Trajectories, Trajectories