Sciweavers

Share
EDBT
2004
ACM

Spatial Queries in the Presence of Obstacles

10 years 9 months ago
Spatial Queries in the Presence of Obstacles
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.
Jun Zhang, Dimitris Papadias, Kyriakos Mouratidis,
Added 08 Dec 2009
Updated 08 Dec 2009
Type Conference
Year 2004
Where EDBT
Authors Jun Zhang, Dimitris Papadias, Kyriakos Mouratidis, Manli Zhu
Comments (0)
books