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Erschienen in:
2008 | OriginalPaper | Buchkapitel
OLAP for Trajectories
verfasst von : Oliver Baltzer, Frank Dehne, Susanne Hambrusch, Andrew Rau-Chaplin
Erschienen in: Database and Expert Systems Applications
Verlag: Springer Berlin Heidelberg
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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. An implementation of our new interactive OLAP environment for trajectories can be accessed at
http://OLAP-T.cgmlab.org
.