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Encyclopedia of GIS pp 538–543Cite as

Indexing the Positions of Continuously Moving Objects

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Synonyms

Indexing moving objects; Spatio-temporal indexing

Definition

Wireless communications and positioning technologies enable tracking of the changing positions of objects capable of continuous movement. Continuous movement poses new challenges to database technology. In conventional databases, data is assumed to remain constant unless it is explicitly modified. Capturing continuous movement under this assumption would entail either performing very frequent updates or recording outdated, inaccurate data, neither of which are attractive alternatives. Instead, rather than storing simple positions, functions of time that express the objects' changing positions are stored [21]. More specifically, linear functions are assumed. This entry describes indexing of the current and anticipated future positions of such objects with the focus on the TPR‑tree [16].

Figure 1
figure 1

Query examples for one-dimensional data [16]

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Author information

Authors and Affiliations

  1. Department of Computer Science, Aalborg University, Aalborg, Denmark

    Simonas Šaltenis

Authors
  1. Simonas Šaltenis
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Editor information

Editors and Affiliations

  1. Faculty of Computer Science and Engineering, University of Minnesota, Minneapolis, MN, 55455, USA

    Shashi Shekhar (McKnight Distinguished University Professor) (McKnight Distinguished University Professor)

  2. Management Science and Information Systems Department, Rutgers Business School Newark and New Brunswick Rutgers, the State University of New Jersey, Newark, NJ, 07102, USA

    Hui Xiong (Assistant Professor) (Assistant Professor)

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© 2008 Springer-Verlag

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Šaltenis, S. (2008). Indexing the Positions of Continuously Moving Objects. In: Shekhar, S., Xiong, H. (eds) Encyclopedia of GIS. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35973-1_618

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