Models and Languages for Geo-Ontologies -- Two Types of Hierarchies in Geospatial Ontologies -- Semantic Annotation of Maps Through Knowledge Provenance -- Architecture for a Grounded Ontology of Geographic Information -- Alignment and Integration of Geo-Ontologies -- Towards Effective Geographic Ontology Matching -- An Algorithm for Merging Geographic Datasets Based on the Spatial Distributions of Their Values -- Structure-Based Methods to Enhance Geospatial Ontology Alignment -- Ontology-Based Spatial Information Retrieval -- Geographic Information Retrieval by Topological, Geographical, and Conceptual Matching -- A Rule-Based Description Framework for the Composition of Geographic Information Services -- Algorithm, Implementation and Application of the SIM-DL Similarity Server -- Formal Representation for GeoSpatial Data -- A Location and Action-Based Model for Route Descriptions -- Spatio-temporal Conceptual Schema Development for Wide-Area Sensor Networks -- Modeling Spatio-temporal Network Computations: A Summary of Results -- Integration of Semantics into Spatial Query Processing -- Building Geospatial Ontologies from Geographical Databases -- Applying Spatial Reasoning to Topographical Data with a Grounded Geographical Ontology -- Supporting Complex Thematic, Spatial and Temporal Queries over Semantic Web Data -- Short Papers -- Semantic Similarity Applied to Generalization of Geospatial Data -- Towards Semantics for Map Styles -- DAGIS: A Geospatial Semantic Web Services Discovery and Selection Framework -- The Gravity Data Ontology: Laying the Foundation for Workflow-Driven Ontologies.