This book constitutes the refereed proceedings of the 7th International Symposium on Web and Wireless Geographical Information Systems, W2GIS 2007, held in Cardiff, UK, in November 2007.

The 21 revised full papers presented were carefully reviewed and selected from 45 submissions. The papers provide an up-to-date review of advances in recent development of Web and wireless geographical information systems. Furthermore, they address issues like conceptual and logical models for W2GIS, data management and data retrieval methods, geographical search engines and Web services, W2GIS query languages and interfaces, 2D and 3D information visualization, exploratory cartography and interfaces, W2GIS data mining, W2GIS security, W2GIS applications and prototypes, location-based services, semantic geo-spatial Web, mobile and wireless GIS, as well as ubiquitous W2GIS.