Computing Point Enclosures

  • Authors:
  • V. K. Vaishnavi

  • Affiliations:
  • Department of Information Systems, Georgia State University

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1982

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Abstract

Given a set of n rectangles in the plane, the point enclosure query is the question to determine for any point p which rectangles of the set it is contained in. It is the "dual" of the well-known range query in computational geometry. It is shown that the point enclosure query in the plane can be answered in 0(log n + k) time, where k is the number of rectangles reported. The solution makes use of a new data structure, called the S-tree. The data structure can be generalized to obtain an efficient algorithm for the point enclosure problem in d-dimensional space d = 2.