HKUST Library Institutional Repository Banner

HKUST Institutional Repository >
Computer Science and Engineering >
CSE Journal/Magazine Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/186
Title: Indexing and retrieval of historical aggregate information about moving objects
Authors: Papadias, Dimitris
Tao, Yufei
Zhang, Jun
Mamoulis, Nikos
Shen, Qiongmao
Sun, Jimeng
Keywords: Spatio-temporal
OLAP
Indexing
Issue Date: 2002
Citation: IEEE data on engineering bulletin (special issue on indexing of moving objects), v. 25, no. 2, 2002, p. 10-17
Abstract: Spatio-temporal databases store information about the positions of individual objects over time. In many applications however, such as traffic supervision or mobile communication systems, only summarized data, like the average number of cars in an area for a specific period, or phones serviced by a cell each day, is required. Although this information can be obtained from operational databases, its computation is expensive, rendering online processing inapplicable. A vital solution is the construction of a spatiotemporal data warehouse. In this paper, we describe a framework for supporting OLAP operations over spatiotemporal data. We argue that the spatial and temporal dimensions should be modeled as a combined dimension on the data cube and present data structures, which integrate spatiotemporal indexing with pre-aggregation. While the well-known materialization techniques require a-priori knowledge of the grouping hierarchy, we develop methods that utilize the proposed structures for efficient execution of ad-hoc group-bys. Our techniques can be used for both static and dynamic dimensions.
Rights: © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
URI: http://hdl.handle.net/1783.1/186
Appears in Collections:CSE Journal/Magazine Articles

Files in This Item:

File Description SizeFormat
DE02.pdfpre-published version113KbAdobe PDFView/Open

All items in this Repository are protected by copyright, with all rights reserved.