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Abstract. The research presented in this paper introduces the principles of a multi-dimensional contextual approach for adaptive GIS. The framework makes the difference beetween the user, geographical and device contexts. The geographical context is modelled according to the location of the user, the region of interest, the extent of the region covered by the diffusion of the data, and the place where the information is processed. This characterization allows for the study of the different contextual configurations, and their impact on the design of mobile services. The framework is applied to maritime navigation.

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With continuous increase of available online spatial data, requirements for the adaptation of spatial content to user's context becomes increasingly important. Location-based services (LBS) deliver to the user information specific to a given location preferably using mobile devices. Personalizing the information provided to the user to take into account her/his information preferences and current location, the problem of inundating the user with irrelevant information is avoided. The research presented in this paper introduces an approach which implicitly monitors the user's activity and generates a user profile reflecting her/his information preferences based on the interactions of the user with the system, and her/his physical location and movements. The system recognizes the user profile and adapts accordingly both to provide suitable information, and to prioritize the functionality appropriate to the user's current context.