Adaptive hypermedia for user-centered geovisualization in multiplatform environment

For years Geographic Information has been tightly linked to local systems and GIS workstation. In the current evolution of WWW and devices (like integrated GPS receivers in PDAs, cell phones and other wireless systems) it appears evident that users can have a different perception in geographic information respect to the past. They can desire to search and share spatial information about the environment in which they daily move. In this context,the access to GIS systems is necessarily distributed and users express their requests in many forms according to their personal view about spatial notion. So adaptivity and personalized interaction with GIS services are a major issue and hypermedia can be used as an adaptive GIS interface. We sketch a conceptual architecture for interoperable GIS, compliant with web design principles, taking into account the need of semantic interaction,which lead to the identification of specific composite web services in a ubiquitous and multiplatform environment.