Grounding Linked Open Data in WordNet: The Case of the OSM Semantic Network -- A Strategy for Optimizing a Multi-Site Query in a Distributed Spatial Database -- The Impact of Spatial Resolution and Representation on Human Mobility Predictability -- A Data-driven Approach for Convergence Prediction on Road Network -- Tour Suggestion for Outdoor Activities -- Interpreting Pedestrian Bahaviour by Visualising and Clustering Movement Data -- A Multi-Modal Communication Approach to Describing the Surroundings to Mobile Users -- An Adaptive Context Acquisition Framework to Support Mobile Spatial and Context-Aware Applications -- Comparing Close Destination and Route-based Similarity Metrics for the Analysis of Map User Trajectories A Sensor Data Mediator Bridging the OGC Sensor Observation Service (SOS) and the OASIS Open Data Protocol (OData) -- Dynamic Objects E_ect on Visibility Analysis in 3D Urban Environments -- Exploring Spatial Business Data: A Resource Oriented Architecture eCampus Application -- ISOGA: a System for Geographical Reachability Analysis Enhanced with Statistics -- A high performance Web-based system for analyzing and visualizing spatiotemporal data for climate studies -- Personalized Accessibility Maps (PAMs) for Communities with Special Needs -- A probabilistic model for road selection in mobile maps.

This book constitutes the refereed conference proceedings of the 12th International Symposium, W2GIS 2013, held in Banff, Canada, in April 2013. The 11 revised full papers and 5 short papers presented were carefully selected from 28 submissions. The program covers a wide range of topics including Spatial Semantics and Databases, Location-based Services and Applications, Trajectory Representation and Sensor Web, Spatial Analysis and Systems and Map Generation and Modeling.