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Summary: Efficiently Querying Moving Objects with Pre-defined
Paths in a Distributed Environment
Cyrus Shahabi, Mohammad R. Kolahdouzan, Snehal Thakkar,
Jose Luis Ambite
and Craig A. Knoblock
Department of Computer Science and
Information Sciences Institute
University of Southern California
Los Angeles, California 90089
[shahabi, kolahdoz, snehalth]@usc.edu [ambite, knoblock]@isi.edu
ABSTRACT
Due to the recent growth of the World Wide Web, numer-
ous spatio-temporal applications can obtain their required
information from publicly available web sources. We con-
sider those sources maintaining moving objects with prede-
fined paths and schedules, and investigate different plans to
perform queries on the integration of these data sources effi-
ciently. Examples of such data sources are networks of rail-
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