Reports and Papers





Fedra, K. and Jamieson, D.G.
An object-oriented approach to model integration: a river basin information system example. In: Kovar, K. and Nachtnebel, H.P. [eds.]: IAHS Publ. no 235, p669-676.





Discussion

For any practical information and decision support system, it often becomes necessary to use more than a single model representation for different aspects of the same problem. The differences between a fully spatially distributed dynamic simulation model and an optimization model that usually requires a somewhat simplified physical representation of the system should illustrate this point. The need for interactive use, as well as limited data availability in practical applications, in many cases poses additional constraints in terms of resolution, complexity, and computational performance of models.

To make the use of alternative models both efficient and consistent in terms of the underlying data, including the coupling to the spatial data that are central to any environmental information and decision support system, a flexible strategy is required. An object oriented design and implementation, that links spatial data objects with dynamic model objects through a set of methods that encapsulate the interpretation and data requirements of the model seems to provide the necessary flexibility and efficiency to build complex yet easy to use and directly useful - which also means highly customized - environmental information systems.


Copyright 1995-2003 by:   ESS   Environmental Software and Services GmbH AUSTRIA