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Social and Navigational Aspects of Location- Based Information Systems



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GeoNotes Social and Navigational Aspects of LocationBased Information Systems Fredrik Espinoza Per Persson Anna Sandin Hanna Nystr m Elenor Cacciatore and Markus Bylund HUMLE Lab Swedish Institute of Computer Science SICS Box 1263 164 29 Kista Sweden espinoza perp sandin hannan elenor bylund sics se Abstract Location based information systems allow the user to access information in relation to the user s position in geographical space This paper outlines navigational and social aspects of such systems It is argued that location based systems must allow users to participate as content providers in order to achieve a social and dynamic information space Moreover as these systems allow commercial and private users to annotate space with information on a mass scale information filtering techniques will become essential in order to prevent information overload and user disturbance We present a number of content based and social filtering techniques to support this We discuss implications for implementation and we describe a system GeoNotes which takes some of these aspects into account 1 Introduction Some location based systems are centered on the notion of positioning people in relation to each other e g 12 Location based information systems on the other hand position information The basic idea is to connect pieces of digital information to a specific latitude longitude coordinate via some mobile device thereby attaching them to a specific place in space Later users again via some mobile client can access that information In this way users will get the impression that the digital information is actually attached to a place in a way similar to post its graffiti and public signs and posters Quite a few systems have been working with this basic concept over the last five years within the fields of augmented reality wearables and ubiquitous computing 8 3 1 16 20 7 18 4 Some have used goggles as access medium 21 Most however work with handheld devices that may not provide



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