Abstract
Developments in Geographical Information Systems (GIS) have significantly empowered the role of visualisation in spatial planning. Visualisation mobilises ‘visual thinking’ contributing thus to the development of ‘visual communication skills’ through graphical representation, exploration and better understanding of spatial data and spatial relations. Furthermore, GIS support processing and analysis of spatial data as well as the investigation of spatial patterns and future visioning. In their capacity as integrated Spatial Decision Support Systems, GIS offer a critical comparative advantage to the formulation of robust decisions, concerning the future development of complex spatial systems, by enabling the visualisation of the involved elements and the efficient management of geo-referenced data. By refining the integration of Multiple Criteria Decision Analysis (MCDA) into GIS, further advancements can be achieved in spatial decision support processes. The present chapter focuses on the added value that visualisation may provide in spatial planning by integrating GIS technology into the planning process. Firstly, the concept of visualisation under the framework of GIS is analysed. Then, the potential of MCDA in visualisation for spatial analysis is illustrated and finally emphasis is placed on the role such developments may offer in participatory planning and scenario analysis.
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