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Encyclopedia of GIS pp 1–9Cite as

Skyline Queries

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Synonyms

Branch and Bound; Divide and conquer; Information Retrieval; Nearest Neighbor algorithm; Nested-loop, blocked; Ranking Results; Ranking, multi-dimensional; Search, multi-criteria; Search, multi-dimensional; Top-N queries

Definition

Given a set of points p 1, p 2, …, p n , the skyline query returns a set of points P, called skyline points, such that any point p i  ∈ P is not dominated by any other point in the dataset. A point p 1 dominates another point p 2 if p 1 is not worse than p 2 in all dimensions, and p 1 is better than p 2 in at least one dimension. In other words, a point p 1 dominates another point p 2 if and only if the coordinate of p 1 on any axis is smaller than the corresponding coordinate of p 2.

For example, Fig. 1 shows a dataset containing information about hotels. The distance of the hotel from the beach and the price for each hotel are assigned to the X, Yaxis of the plot respectively. There are 12 hotels in total represented as data-points in the...

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References

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Author information

Authors and Affiliations

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

    Nilu Thakur

Authors
  1. Nilu Thakur
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Editor information

Editors and Affiliations

  1. Minneapolis, Minnesota, USA

    Shashi Shekhar

  2. Rutgers Business School, Newark, New Jersey, USA

    Hui Xiong

  3. The University of Iowa Tippie College of Business, Iowa City, Iowa, USA

    Xun Zhou

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© 2016 Springer International Publishing Switzerland

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Thakur, N. (2016). Skyline Queries. In: Shekhar, S., Xiong, H., Zhou, X. (eds) Encyclopedia of GIS. Springer, Cham. https://doi.org/10.1007/978-3-319-23519-6_1221-2

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  • DOI: https://doi.org/10.1007/978-3-319-23519-6_1221-2

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  • Publisher Name: Springer, Cham

  • Online ISBN: 978-3-319-23519-6

  • eBook Packages: Springer Reference Computer SciencesReference Module Computer Science and Engineering

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