Proceedings of the 12th Annual ACM International Workshop on Geographic Information Systems 2004
DOI: 10.1145/1032222.1032248
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Supporting spatial aggregation in sensor network databases

Abstract: Sensor networks are unattended deeply distributed systems whose schema can be conceptualized using the relational model. Aggregation queries on the data sampled at each sensor node are the main means to extract the abstract characteristics of the surrounding environment. However, the non-uniform distribution of the sensor nodes in the environment leads to inaccurate results generated by the aggregation queries. In this paper, we introduce "spatial aggregations" that take into consideration the distribution of … Show more

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Cited by 63 publications
(51 citation statements)
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References 13 publications
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“…The work by [31] extended the types of aggregates supported by introducing (approximate) quantiles such as the median, the consensus, the histogram and range queries. Support for Spatial Aggregation was also suggested by [32] where sensor node would be grouped and aggregates would be computed using Voronoi diagrams. Another approach [33] models the sensor network as a distributed deductive declarative database system.…”
Section: Related Workmentioning
confidence: 99%
“…The work by [31] extended the types of aggregates supported by introducing (approximate) quantiles such as the median, the consensus, the histogram and range queries. Support for Spatial Aggregation was also suggested by [32] where sensor node would be grouped and aggregates would be computed using Voronoi diagrams. Another approach [33] models the sensor network as a distributed deductive declarative database system.…”
Section: Related Workmentioning
confidence: 99%
“…A preliminary version of this work is presented in Sharifzadeh and Shahabi [12], where Voronoi aggregation operator use the exact Voronoi cell at each node. This paper subsumes [12] and proposes AVC-SW that supports dynamism in the sensor network.…”
Section: Introductionmentioning
confidence: 99%
“…This paper subsumes [12] and proposes AVC-SW that supports dynamism in the sensor network. AVC-SW is a novel algorithm for computing the Voronoi cell of a fixed 2-d point when the locations of the neighboring points arrive as a geometric data stream.…”
Section: Introductionmentioning
confidence: 99%