Section I: Philosophical background and Semantics -- Ontology, Epistemology, Teleology: Triangulating Geographic Information Science -- Geonoemata Elicited: Concepts, Objects, and Other Uncertain Geographic Things -- Virtue Ethics for GIS Professionals -- Why Is Scale an Effective Descriptor for Data Quality? The Physical and Ontological Rationale for Imprecision and Level of Detail -- Semantic Engineering -- Section II: Mathematical Methods -- A Common Spatial Model for GIS -- Computation with Imprecise Probabilities -- Spatial Data Quality: Problems and Prospects -- Latent Analysis as a Potential Method for Integrating Spatial Data Concepts -- Stereology for Multitemporal Images with an Application to Flooding -- Modeling Spatiotemporal Paths for Single Moving Objects -- Moving Objects in Databases and GIS: State-of-the-Art and Open Problems -- The Degree Distribution of Random Planar Graphs -- Section III: Tools and Applications -- Geographical Information Engineering in the 21 Century -- Towards Visual Summaries of Geographic Databases Based on Chorems -- Intelligent Spatial Communication -- Training Games and GIS -- Cadastre and Economic Development.