The integration of the Web and Multimedia technologies with Geographical Information Systems (GIS) has recently lead to the development of new forms of multimedia geo-representations. Currently, many geomatics solutions are web-based and provide access to multimedia elements in order to support efficiently specific application domains. The book serves as a collection of multi-disciplinary contributions related to Geographic Hypermedia and highlights the technological aspects of GIS. Specifically, it focuses on its database and database management system. The methodologies for modeling and handling geographic data are described.