FlexTrack: a system for querying flexible patterns in trajectory databases

Authors:
Marcos R. Vieira;Petko Bakalov;Vassilis J. Tsotras
Affiliations:
UC Riverside;ESRI;UC Riverside
Venue:
SSTD'11 Proceedings of the 12th international conference on Advances in spatial and temporal databases
Year:
2011

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Abstract

We describe the FlexTrack system for querying trajectories using flexible pattern queries. Such queries are composed of a sequence of simple spatio-temporal predicates, e.g., range and nearest-neighbors, as well as complex motion pattern predicates, e.g., predicates that contain variables and constraints. Users can interactively select spatio-temporal predicates to construct such pattern queries using a hierarchy of regions that partition the spatial domain. Several different query processing algorithms are currently implemented and available in the FlexTrack system.