Abstract
Many of the more sophisticated techniques and algorithms to process spatial data in spatial models are currently not or hardly available in GISystems. This raises the question of how spatial models should be integrated with GISystems. This chapter discusses possibilities and problems of interfacing spatial interaction models and GISystems from a conceptual rather than a technical point of view. The contribution illustrates that the integration between spatial analysis/modelling and GIS opens up tremendous opportunities for the development of new, highly visual, interactive and computational techniques for the analysis of spatial flow data. Using the Spatial Interaction Modelling [SIM] software package as an example, the chapter suggests that in spatial interaction modelling GIS functionalities are especially useful in three steps of the modelling process: zone design, matrix building and visualisation.
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