Aggregation Languages for Moving Object and Places of Interest Data

Details Aggregation Languages for Moving Object and Places of Interest Data Aggregation Languages for Moving Object and Places of Interest Data

2007-08-20

arxiv.org/abs/0708.2717v1

Computer Science

Databases

15 pages, 5 figures

Scientific paper

We address aggregate queries over GIS data and moving object data, where non-spatial data are stored in a data warehouse. We propose a formal data model and query language to express complex aggregate queries. Next, we study the compression of trajectory data, produced by moving objects, using the notions of stops and moves. We show that stops and moves are expressible in our query language and we consider a fragment of this language, consisting of regular expressions to talk about temporally ordered sequences of stops and moves. This fragment can be used to efficiently express data mining and pattern matching tasks over trajectory data.

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