Building real-world trajectory warehouses

  • Authors:
  • Gerasimos Marketos;Elias Frentzos;Irene Ntoutsi;Nikos Pelekis;Alessandra Raffaetà;Yannis Theodoridis

  • Affiliations:
  • University of Piraeus, Greece;University of Piraeus, Greece;University of Piraeus, Greece;University of Piraeus, Greece;University Ca' Foscari Venezia, Italy;University of Piraeus, Greece

  • Venue:
  • Proceedings of the Seventh ACM International Workshop on Data Engineering for Wireless and Mobile Access
  • Year:
  • 2008

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Abstract

The flow of data generated from low-cost modern sensing technologies and wireless telecommunication devices enables novel research fields related to the management of this new kind of data and the implementation of appropriate analytics for knowledge extraction. In this work, we investigate how the traditional data cube model is adapted to trajectory warehouses in order to transform raw location data into valuable information. In particular, we focus our research on three issues that are critical to trajectory data warehousing: (a) the trajectory reconstruction procedure that takes place when loading a moving object database with sampled location data originated e.g. from GPS recordings, (b) the ETL procedure that feeds a trajectory data warehouse, and (c) the aggregation of cube measures for OLAP purposes. We provide design solutions for all these issues and we test their applicability and efficiency in real world settings.