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» Efficient Aggregation over Objects with Extent
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PODS
2002
ACM
89views Database» more  PODS 2002»
14 years 5 months ago
Efficient Aggregation over Objects with Extent
Donghui Zhang, Vassilis J. Tsotras, Dimitrios Guno...
GIS
2004
ACM
14 years 5 months ago
Spatio-temporal aggregates over raster image data
Spatial, temporal and spatio-temporal aggregates over continuous streams of remotely sensed image data build a fundamental operation in many applications in the environmental scie...
Jie Zhang, Michael Gertz, Demet Aksoy
ADC
2010
Springer
266views Database» more  ADC 2010»
12 years 12 months ago
Counting distinct objects over sliding windows
Aggregation against distinct objects has been involved in many real applications with the presence of duplicates, including real-time monitoring moving objects. In this paper, we ...
Wenjie Zhang, Ying Zhang, Muhammad Aamir Cheema, X...
COMAD
2008
13 years 6 months ago
Concurrency Control in Distributed MRA Index Structure
Answering aggregate queries like sum, count, min, max over regions containing moving objects is often needed for virtual world applications, real-time monitoring systems, etc. Sin...
Neha Singh, S. Sudarshan
INFOVIS
2005
IEEE
13 years 10 months ago
Multivariate Glyphs for Multi-Object Clusters
Aggregating items can simplify the display of huge quantities of data values at the cost of losing information about the attribute values of the individual items. We propose a dis...
Eleanor Boyle Chlan, Penny Rheingans