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Topiary: A Tool for Prototyping Location-Enhanced Applications
Yang Li, Jason I. Hong, James A. Landay,
Presented by Daniel Schulman
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Location-Enhanced Applications
Use the location of users, others.Examples:
AT&T Find Friends service.E911
Hard to design:Need lots of technical expertise.Must use low-level sensing technology.
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Topiary
A prototyping tool for location-enhanced applications.
Supports iterative design without actually having to wander around for testing.
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Topiary
Active Map:Models a map and locations within it.
Scenario Producer:Specify which people and locations are
involved.Storyboard Workshop:
Storyboards can be triggered by scenarios.
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Topiary – User Testing
Testing is done via a Wizard-of-Oz setup.
The designer can move people and items around on the map.
If real sensor data is available, it can also be used (via wireless networking).
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Topiary – Evaluation
Participants created a tour-guide application.
All were able to use Topiary, and found it relatively easy.
The research team also iteratively designed a tour guide themselves.
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Critique
A useful new tool for a fairly new type of UI.
Based on lots of assumptions about the type of UI that is being designed:Heavily biased towards map-based UIs.There could be other kinds of location-
enhanced applications.
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Future Directions
Why restrict yourself to 2D maps?3D is important – what floor am I on? Is the map always the most important thing
to show the end-user? Is there always a single map?
Shifts in scale – from an outside to an inside map.
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Future Directions
Why restrict yourself to location?Can sense orientation, temperature,
lighting, movement, etc.The use of a Wizard-of-Oz setup for testing
can generalize – can Topiary’s interface also be generalized?