Conference Proceeding Article
Despite the existence of obstacles in many database applications, traditional spatial query processing utilizes the Euclidean distance metric assuming that points in space are directly reachable. In this paper, we study spatial queries in the presence of obstacles, where the obstructed distance between two points is defined as the length of the shortest path that connects them without crossing any obstacles. We propose efficient algorithms for the most important query types, namely, range search, nearest neighbors, e-distance joins and closest pairs, considering that both data objects and obstacles are indexed by R-trees. The effectiveness of the proposed solutions is verified through extensive experiments.
Databases and Information Systems | Numerical Analysis and Scientific Computing
Data Management and Analytics
Advances in database technology EDBT 2004: 9th International Conference on Extending Database Technology: Hērakleion, Crete, Greece, March 14-18, 2004: Proceedings
City or Country
ZHANG, Jun; PAPADIAS, Dimitris; MOURATIDIS, Kyriakos; and ZHU, Manli.
Spatial Queries in the Presence of Obstacles. (2004). Advances in database technology EDBT 2004: 9th International Conference on Extending Database Technology: Hērakleion, Crete, Greece, March 14-18, 2004: Proceedings. 2992, 366-384. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/881
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