Top-K probabilistic closest pairs query in uncertain spatial databases

  • Authors:
  • Mo Chen;Zixi Jia;Yu Gu;Ge Yu

  • Affiliations:
  • Northeastern University, China;Northeastern University, China;Northeastern University, China;Northeastern University, China

  • Venue:
  • APWeb'11 Proceedings of the 13th Asia-Pacific web conference on Web technologies and applications
  • Year:
  • 2011

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Abstract

An important topic in the field of spatial data management is processing the queries involving uncertain locations. This paper focuses on the problem of finding probabilistic K closest pairs between two uncertain spatial datasets, namely, Top-K probabilistic closest pairs (TopK-PCP) query, which has popular usages in real applications. Specifically, given two uncertain datasets in which each spatial object is modeled by a set of sample points, a TopK-PCP query retrieves the pairs with top K maximal probabilities of being the closest pair. Due to the inherent uncertainty of data objects, previous techniques to answer K-closest pairs (K-CP) queries cannot be directly applied to our TopK-PCP problem. Motivated by this, we propose a novel method to evaluate TopK-PCP query effectively. Extensive experiments are performed to demonstrate the effectiveness of our method.