Processing object-orientation-based direction queries: A summary of results

X. Liu, S. Shekhar, S. Chawla

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

Direction based spatial relationships are critical in many domains including geographic information systems (GIS) and image interpretation. They are also frequently used as selection conditions in spatial queries. In this paper, we explore the processing of queries based on object-orientation-based directional relationships. A new open shape based strategy(OSS) is proposed. OSS converts the processing of the direction predicates to the processing of topological operations between open shapes and closed geometry objects. Since OSS models the direction region as an OpenShape, it does not need to know the boundary of the embedding world, and also eliminating the computation related to the world boundary. The experimental evaluations show that OSS consistently outperforms classical range query strategy both in I/O and CPU cost. This paper is a summary of the results.

Original languageEnglish
Pages69-76
Number of pages8
Publication statusPublished - 1 Dec 2000
Event8th ACM Workshop on Advances in Geographic Information Systems - Washington, DC, United States
Duration: 10 Nov 200011 Nov 2000

Other

Other8th ACM Workshop on Advances in Geographic Information Systems
CountryUnited States
CityWashington, DC
Period10/11/0011/11/00

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Keywords

  • Direction
  • Open shape
  • Orientation
  • Range query
  • Spatial query processing
  • Topological operations

ASJC Scopus subject areas

  • Computer Science(all)

Cite this

Liu, X., Shekhar, S., & Chawla, S. (2000). Processing object-orientation-based direction queries: A summary of results. 69-76. Paper presented at 8th ACM Workshop on Advances in Geographic Information Systems, Washington, DC, United States.