This book constitutes the refereed conference proceedings of the 13th International Symposium, W2GIS 2014, held in Seoul, South Korea, in May 2014. The 12 revised full papers presented were carefully selected from numerous submissions. The program covers a wide range of topics including Communication and Parallel Processing for Geospatial Data, Geo-Social Net, Crowdsourcing, and Trajectory, Geo-Sensor Network, Applications of W2GIS, Indoor GIS.

These proceedings contain the papers selected for presentation at the 5th edition of the International Workshop on Web and Wireless Geographical Information Systems, held in December 2005, in Lausanne, Switzerland. The aim of the series of annual W2GIS workshops is to provide an up-to-date review of advances on recent devel- ment and research results in the field of web and wireless geographical information systems. It follows the successful 2001, 2002, 2003, 2004 editions, held in Kyoto, Singapore, Rome and Seoul, respectively. It now represents a young but rapidly - turing research community. In its 5th year, W2GIS reached new heights of recognition as a quality workshop for the dissemination and discussion on latest research and development achievements in the domain. The number of papers received for this workshop demonstrates the growing interest of the research community. There were 70 submissions from 17 countries, many of them of excellent quality and most of them very related to the t- ics of the workshop. Each paper receives three reviews. Based on these reviews, 25 papers were selected for presentation and inclusion in the proceedings. The accepted papers cover a wide range of topics from the Semantic Web, Web personalization, contextual representation and mapping to querying in mobile environments, to mobile networks and location-based services. We had the privilege of having a distinguished invited talk "The next revolution: Peer-to-Peer discovery on mobile devices" by Ouri Wolfson, University of Illinois at Chicago, USA.

This book constitutes the refereed proceedings of the 18th International Symposium on Web and Wireless Geographical Information Systems, W2GIS 2019, held in Wuhan, China, in November 2020. The 8 full papers presented together with 15 progress papers or short papers in the volume were carefully reviewed and selected from 40 submissions. The papers cover topics that range from mobile GIS and Location-Based Services to Spatial Information Retrieval and Wireless Sensor Networks

This book constitutes the refereed proceedings of the 14th International Symposium on Spatial and Temporal Databases, SSTD 2015, held in Hong Kong, China, in August 2015. The 24 revised full papers together with 8 demos presented were carefully reviewed and selected from 64 submissions. The conference program has the scope on following subjects: reachability query and path query, reverse query and indexing, navigation and routing, trajectory analysis, spatio-temporal approaches, privacy and matching, similarity search and pattern, keyword and pattern.