ACMGIS'02 (abstract)
The paper describes how the Web can be used as a support for
intensive querying and display of large moving objects databases. We
present first an architecture for a system which integrates incoming
events provided by GPS servers in a spatio-temporal database, and
permits to register queries over this database. We focus on
continuous queries that allow users to receive notification of
events affecting the initial result, and discuss the process of
matching queries and events
in order to perform this notification.
Finally a prototype implementing a simplified
version of this architecture is described. It uses
standard XML-based languages in order to visualize the result
of a query as dynamic maps where the motions can be tracked in real
time.
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