Abstract
In this paper is proposed a structure for the development of a generic graphical system for modelling spatial processes (SMSP). This system seeks to integrate the spatial data handling operations of a GIS with specialist numerical modelling functionality, by the description of the processes involved. A conceptual framework is described, the foundation of which are six defined modules (or services) that are considered a minimum requirement for basic system operation. The services are identified following description of the three key components to systems integration, and the examination of the preferred integrating structure. The relationship of the integration components to sample commentary on the future requirements of integration is discussed, and the benefits and deficiencies of an implemented system for modelling spatial processes are noted.