This book constitutes the refereed proceedings of the 4th International Conference on GeoSpatial Semantics, GeoS 2011, held in Brest, France, in May 2011. The 13 papers presented together with 1 invited talk were carefully reviewed and selected from 23 submissions. The papers focus on formal and semantic approaches, time and activity-based patterns, ontologies, as well as quality, conflicts and semantic integration. They are organized in topical sections on ontologies and gazetteers, activity-based and temporal issues, models, quality and semantic similarities, and retrieval and discovery methods.

The 8th edition of the International Symposium on Web and Wireless Geograp- cal Information Systems (W2GIS 2008) was held in December 2008, in the vibrant city of Shanghai, China. This annual symposium aims at providing a forum for discussing advances on recent developments and research results in the ?eld of Web and wireless geographical information systems. Promoted from workshop to s- posium in 2005, W2GIS now represents a prestigious event within this dynamic research community. These proceedings contain the papers selected for presen- tion at this international event. For the 2008 edition, we received 38 submissions from 16 countries. All subm- ted papers were related to topics of interest to the symposium. Each paper received three reviews. Based on these reviews, 14 papers were selected for presentation and inclusion in the proceedings. The accepted papers are all of excellent quality and cover topics that range from mobile networks and location-based services, to contextual representation and mapping, to geospatial Web techniques, to object tracking in Web and mobile environments. We wish to thank all authors that contributed to this symposium for the high quality of their papers and presentations. Our sincere thanks go to Springer's LNCS team. We would also like to acknowledge and thank the Program C- mittee members for the quality and timeliness of their reviews. Finally, many thanks to the Steering Committee members for providing continuous support and advice.

This book constitutes the refereed joint proceedings of six international workshops held in conjunction with the 26th International Conference on Conceptual Modeling, ER 2007, in Auckland, New Zealand, in November 2007.

The 40 revised full papers presented were carefully reviewed and selected from 114 submissions. Topics addressed by the workshops are conceptual modeling for life sciences applications (CMLSA 2007), foundations and practices of UML (FP-UML 2007), ontologies and information systems for the semantic Web (ONISW 2007), quality of information systems (QoIS 2007), requirements, intentions and goals in conceptual modeling (RIGiM 2007), and semantic and conceptual issues in geographic information systems (SeCoGIS 2007).

This book constitutes the proceedings of the 12th International Conference on Spatial Information Theory, COSIT 2015, held in Santa Fee, NM, USA, in October 2015. The 22 papers presented in this book were carefully reviewed and selected from 52 full paper submissions. The following topics are addressed: formalizing and modeling space-time, qualitative spatio-temporal reasoning and representation, language and space, signs, images, maps, and other representations of space, navigations by humans and machines.

Geographic data is a valuable source of information in modern society. By utilizing alternative sources of this data, the availability and potential applications of geographic information systems can be increased. Volunteered Geographic Information and the Future of Geospatial Data is a pivotal reference source for the latest scholarly research on information gathering from volunteers, as opposed to official agencies and private companies, to compile geospatial data. Highlighting a range of pertinent topics such as regional landscape mapping, road safety, and land usage, this book is ideally designed for researchers, academics, students, professionals, and practitioners interested in the growing area of volunteered geographic information.