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In this paper, we investigate a mediation-based approach to integrating information from geospatial information sources such as GIS’s and databases of geo-referenced imagery. This approach is based on the use of XML to represent the information at the sources, by exporting XML Document Type Definitions (DTD’s) associated with each source, and employing XMLbased query languages to query integrated...
The datasets generated by satellite observations and super-computer simulations are overwhelming conventional methods of storage and access, leading to unreasonably long delays in data analysis. The major problem that we address is the slow access, from large datasets in archival storage, to small subsets needed for scientific visualization and analysis. The goal is to minimize the amount of storage...
Most high-dimensional indexing structures proposed for similarity query in content-based image retrieval (CBIR) systems are tree-structured. The quality of a high-dimensional tree-structured index is mainly determined by its insertion algorithm. Our approach focuses on an important phase in insertion, that is, the tree descending phase, when the tree is explored to find a host node to accommodate...
Many applications of computer-aided design (CAD) and scientific visualization involve representing and manipulating large CAD databases. Structural and mechanical designers often create models of ships, oil platforms, spacecraft, and process plants that are composed of hundreds of thousands of parts and take many gigabytes of storage space. Furthermore, their model complexity exceeds the interactive...
The need and opportunity to efficiently find patterns and features in the vast and growing scientific data sets of today is apparent. In this paper, we present an extensible and distributed query processing system called Conquest (CONcurrent QUEries over Space and Time) which delivers high performance for non-traditional database query applications. Conquest is composed of three components: query management subsystem...
Spatio-temporal database management systems can become an enabling technology for important applications such as Geographic Information Systems (GIS), environmental information systems, and multimedia. In this paper we address research issues in spatio-temporal databases, by providing an analysis of the challenges set, the problems encountered, as well as the proposed solutions and the envisioned...
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