One compelling scenario for the use of GPS enabled phones is support for navigation. While service based approaches to support such navigation tasks are becoming increasingly available whereby a user downloads (for a fee) a relevant map of her current area onto her GPS enabled phone, the approach is often far from ideal. Typically such maps are highly generalised and may not match the users current activity and needs. Indeed, one will often see such specialised maps on public signs situated where they may be required and it is interesting to consider how one might enable users to walk up to such situated signs and use their mobile phone to take away the map presented in order to use it to assist their on-going navigation activity. With our J2ME application, we show how the user grabs a map shown on a public display by taking a photograph of it and using it as a digital map on her mobile phone (optimized for Nokia N95 S60).
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