Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
Model management issues and directions
Decision Support Systems - Special issue on model management systems
From Extensible Databases to Interoperability between Multiple Databases and GIS Applications
SSD '93 Proceedings of the Third International Symposium on Advances in Spatial Databases
A Framework for Integrating GIS and Digital Images
ISD '99 Selected Papers from the International Workshop on Integrated Spatial Databases, Digital Inages and GIS
Multi-model Framework for modeling Holistic Climate and Air quality Strategies
Proceedings of International Conference on Information Integration and Web-based Applications & Services
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Special purpose modelling packages can become more accessible and more effective for decision support when integrated into a spatial information system. Integration is made difficult by differences in the models due to scope, underlying data models, and command languages. This paper extends a federated information systems design methodology and architecture by identifying parallels of the model integration problem with the database integration problem in federated database design. A schema architecture is proposed together with associated schema translation functions. The role of a problem statement, analogous to a federated database query, is defined. Our design approach is demonstrated in HYDRA, a decision support system for water quality management.