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Figure M3.1 Emerging location based services on phones provide a simple but compelling value proposition:find where you want to go, and never get lost again. These screen shots are from an NTT DoCoMo service in Japan that lets customers search for nearby businesses and restaurants and see maps showing how to get there.What kinds of compelling location-based services are emerging, and how do you design them well?

Location-based services are useful as guides for exploration and navigation, for tagging and retrieving information, for coordinating better with other people, for augmented reality games, and for vehicle tracking. In all of these applications, be sure to design for privacy from the start.