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In this paper we describe the development of Internet-based approaches to public participation and on-line spatial decision support systems in particular. Two case studies in developing web-based public participation GIS (PPGIS), one local and one regional, are described in detail. Results from the live testing of these systems are shown. These are discussed in the light of recent developments in ‘cyberdemocracy’ and conclusions are drawn about principles of on-line PPGIS and problems associated with public participation, user interaction, and familiarity with IT, copyright issues, access to the Internet, and relevant political structures.

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In this paper we outline some of the results that were obtained by the application of a Cray T3D parallel supercomputer to human geography problems. We emphasise the fundamental importance of high-performance computing (HPC) as a future relevant paradigm for doing geography. We offer an introduction to recent developments and illustrate how new computational intelligence technologies can start to be used to make use of opportunities created by data riches from geographic information systems, artificial intelligence tools, and HPC in geography.