chapter 1 Introduction — Twenty years of : Choosing the Classics -- chapter 2 A Mark 1 Geographical Analysis Machine for the Automated Analysis of Point Data Sets -- chapter 3 A Review and Conceptual Framework of Automated Map Generalization -- chapter 4 Propagation of Errors in Spatial Modelling with GIS -- chapter 5 A Comparison of Techniques for Calculating Gradient and Aspect from a Gridded Digital Elevation Model -- chapter 6 Object-Oriented Data Modelling for Spatial Databases -- chapter 7 Point-Set Topological Spatial Relations -- chapter 8 Modelling Accessibility Using Space-Time Prism Concepts within Geographical Information Systems -- chapter 9 Geographical Information Science* -- chapter 10 Algorithm and Implementation Uncertainty in Viewshed Analysis -- chapter 11 Development of a Geomorphological Spatial Model Using Object-Oriented Design -- chapter 12 Integrating Geographical Information Systems and Multiple Criteria Decision-Making Methods -- chapter 13 The Geography of Parameter Space: An Investigation of Spatial Non-Stationarity -- chapter 14 Qualitative Spatial Reasoning: Cardinal Directions as an Example -- chapter 15 Assessing, Representing, and Transmitting Positional Uncertainty in Maps -- chapter 16 Loose-Coupling a Cellular Automaton Model and GIS: Long-Term Urban Growth Prediction for San Francisco and Washington/Baltimore -- chapter 17 Overcoming the Semantic and Other Barriers to GIS Interoperability -- chapter 18 Interactive Maps for Visual Data Exploration* -- chapter 19 Geographical Categories: An Ontological Investigation -- chapter 20 Extending GIS-Based Visual Analysis: The Concept of Visualscapes -- chapter 21 Collaboration Networks Revealed by Authors.