Theories for the Semantics of Geospatial Information -- Comparing Representations of Geographic Knowledge Expressed as Conceptual Graphs -- Ontology Ontogeny: Understanding How an Ontology Is Created and Developed -- Representing the Meaning of Spatial Behavior by Spatially Grounded Intentional Systems -- Formal Representations for Geospatial Data -- Processes and Events in Dynamic Geo-Networks -- A Qualitative Trajectory Calculus and the Composition of Its Relations -- Modeling Noteworthy Events in a Geospatial Domain -- Similarity Comparison of Spatial Data Sets -- Measuring Semantic Similarity Between Geospatial Conceptual Regions -- Using Semantic Similarity Metrics to Uncover Category and Land Cover Change -- Measuring Arrangement Similarity Between Thematic Raster Databases Using a QuadTree-Based Approach -- Ontology-Based Spatial Information Retrieval -- Extending Semantic Similarity Measurement with Thematic Roles -- Exploiting Geospatial Markers to Explore and Resocialize Localized Documents -- Ontology Matching for Spatial Data Retrieval from Internet Portals -- Geospatial Semantic Web -- Geospatial Semantic Web: Architecture of Ontologies -- Formal Approach to Reconciliation of Individual Ontologies for Personalisation of Geospatial Semantic Web -- Incorporating Update Semantics Within Geographical Ontologies -- Short Papers -- Purpose-Driven Navigation -- Mobile GIS: Attribute Data Presentation Under Time and Space Constraints -- Ontology-Driven Description of Spatial Data for Their Semantic Processing -- An Interstage Change Model for Sandbox Geography.