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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 6 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»
13 years 9 days 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 11 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