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Chengyang Zhang Computer Science Department University of North Texas. Aggregating and Querying Geo-Streams : From static sensors to Evolving Phenomena. Refers to data emitted by geo-referenced sensors and sensor networks, such as water level , vehicle speed - PowerPoint PPT Presentation
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Aggregating and Querying Geo-Streams:
From static sensorsto Evolving Phenomena
Chengyang ZhangComputer Science Department
University of North Texas
06/26/08 CRI Group Meeting
• Refers to data emitted by geo-referenced sensors and sensor networks, such as water level, vehicle speed
• Queries are often interested in moving/evolving phenomena, such as flood, traffic jam
• Need to bridge the gap between the point observations and continuousphenomena in REAL time.
Geo-Stream
CRI Group Meeting
Challenges
• Supporting spatio-temporal stream data types
• Allow geo-streams to be grouped according to spatial proximity and then elevated into streaming regions
• Query Processing and Optimization