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Time Aggregated Graphs

  • Reference work entry
  • First Online:
Encyclopedia of Database Systems

  • 19 Accesses

Synonyms

Time-dependent graphs; Time-dependent networks

Definition

A time aggregated graph [1, 2] is a model that can be used to represent a spatio-temporal network. The topology and the attributes in a spatio-temporal network are typically time-dependent. Time aggregated graphs aggregate the time-dependent attributes over edges and nodes. This model facilitates the computation of path queries on a network accounting for the time-dependence of network parameters.

Key Points

Graphs have been extensively used to model spatial networks; weights assigned to nodes and edges are used to encode additional information. For example, the travel time between two intersections in a road network can be represented by the weight of the edge connecting the nodes that represent the intersections. In a real world scenario, it is not uncommon for these network parameters to be time-dependent. A time aggregated graph is a model that can capture the time-dependence of network parameters. In addition, the...

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Recommended Reading

  1. George B, Shekhar S. Time-aggregated graphs for modeling spatio-temporal networks – an extended abstract. In: Proceeding of the Workshops at International Conference on Conceptual Modeling; 2006. p. 85–93.

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  2. George B, Kim S, Shekhar S. Spatio-temporal network databases and routing algorithms: a summary of results. In: Proceeding of the 10th International Symposium Advances in Spatial and Temporal Databases; 2007. p. 460–77.

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Author information

Authors and Affiliations

  1. Oracle (America), Nashua, NH, USA

    Betsy George

  2. Department of Computer Science, University of Minnesota, Minneapolis, MN, USA

    Shashi Shekhar

Authors
  1. Betsy George
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  2. Shashi Shekhar
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Corresponding author

Correspondence to Betsy George .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, GA, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, ON, Canada

    M. Tamer Özsu

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George, B., Shekhar, S. (2018). Time Aggregated Graphs. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_5053

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