Introduction to Representing, Modeling, and Visualizing the Natural Environment, G. Harvey, N. Mount, P. Aplin, and G. Priestnall Representing the Natural Environment Keynote Paper: Representation of the Natural Environment, M. Duckham Keynote Paper: Representing Surfaces in the Natural Environment: Implications for Research and Geographical Education, N. Waters Developing Ontologies from a Domain Expert Perspective, F. Hemsley-Flint, G. Hart, J. Lee, and S. Thompson The Spatial Disaggregation of Great Britain and European Agricultural Land Use, C.J. McClean Comparing Different Land Cover Data Sets for Agricultural Monitoring in Africa, S. Fritz, L. See, F. Rembold, M. Massart, T. Ngre, and C. von Hagen Using GIS to Identify Wildland Areas in the North Pennines, S. Blair, L. See, S. Carver, and P. Samson Representations of Environmental Data in Web-Based GIS, P. Mooney and A.C. Winstanley Developing and Applying a Participative Web-Based GIS for Integration of Public Perceptions into Strategic Environmental Assessment, A. Gonzalez, A. Gilmer, R. Foley, J. Sweeney, and J. Fry Modeling the Natural Environment Keynote Paper: Challenges for Environmental Modeling, R. Aspinall Keynote Paper: Spatial Scale and Neighborhood Size in Spatial Data Processing for Modeling the Natural Environment, A-X. Zhu Invited Paper: Toward an Algebra for Terrain-Based Flow Analysis, D.G. Tarboton and M.E. Baker Spatial Terrain Modeling, S. Dalyot and Y. Doytsher Regions and Patterns of Forest Change in Brazil, A. de las Heras and I.R. Lake GM(1,1)-Kriging Prediction of Soil Dioxin Patterns, D. Guo, R. Guo, C. Thiart, and T. Oyana Visualizing the Natural Environment Keynote Paper: Information Access, Depicting Geography, and Geographical Visualization Tools, W.E. Cartwright Keynote Paper: Wiki Cartography and the Visualization of the Natural, D.Z. Sui Invited Paper: GIS-Based Landscape Visualization: The State of the Art, A. Lovett, K. Appleton, and A. Jones Visualizing Species Distributions, D.J. Lieske and D.J. Bender Visualizing Risk for Hill Walkers, A. Jardine and W. Mackaness Using Web-Based 3-D Visualization for Planning Hikes Virtually, S. Bleisch and J. Dykes PastureSim: A Visualization Tool for Pasture Management, C.E S. Rider and F.E. Reitsma Index