Building the data warehouse (2nd ed.)
Building the data warehouse (2nd ed.)
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
An overview and classification of mediated query systems
ACM SIGMOD Record
MOCHA: a self-extensible database middleware system for distributed data sources
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Microsoft TerraServer: a spatial data warehouse
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Environmental Information Systems
Environmental Information Systems
The Data Warehouse Lifecycle Toolkit: Expert Methods for Designing, Developing and Deploying Data Warehouses with CD Rom
Scaling Access to Heterogeneous Data Sources with DISCO
IEEE Transactions on Knowledge and Data Engineering
Meditation to Deal with Heterogeneous Data Sources
INTEROP '99 Proceedings of the Second International Conference on Interoperating Geographic Information Systems
An Architecture for Transparent Access to Semantically Heterogeneous Information Sources
CIA '97 Proceedings of the First International Workshop on Cooperative Information Agents
Semantic Information Brokering: How Can a Multi-agent Approach Help?
CIA '99 Proceedings of the Third International Workshop on Cooperative Information Agents III
Towards heterogeneous multimedia information systems: the Garlic approach
RIDE '95 Proceedings of the 5th International Workshop on Research Issues in Data Engineering-Distributed Object Management (RIDE-DOM'95)
Web services framework for geo-spatial services
W2GIS'04 Proceedings of the 4th international conference on Web and Wireless Geographical Information Systems
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Governmental and environmental agencies have recognized that data Warehouses (DWs) oriented to the environmental domain can have a deep impact on the ability to preserve the environment. However, extracting environmental data from external sources in order to load them into the data organization area of a DW is much more complex when compared with conventional DWs. In environmental DWs, extraction is frequently based on autonomous, heterogeneous external sources distributed over the Web. In order to improve this process, we propose an architecture that combines a middleware system and DW technology. The use of this architecture has been achieved through the implementation of a tool called LSExtract, which has been built on top of a middleware system called Le Select. Its goal is to locate and extract relevant and accurate information from heterogeneous data sources over the Web, extract data published by Le Select, and load it, after some transformations, into the data organization area of an environmental DW.