Identifying Proper Scales on Digital Maps for In-Vehicle Navigation Systems

Authors:
Anna Wu;Xiaolong Zhang
Affiliations:
College of Information Science & Technology, Pennsylvania State University, University Park, USA 16803;College of Information Science & Technology, Pennsylvania State University, University Park, USA 16803
Venue:
UAHCI '09 Proceedings of the 5th International Conference on Universal Access in Human-Computer Interaction. Part III: Applications and Services
Year:
2009

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Abstract

Current commercial mobile navigation systems often use a pre-determined scale selection schema without considering differences in spatial complexity of locations. To identify what map scales people may need and what spatial features make relevant maps stand out, we conducted an experiment on subjective map selection in a route planning task between two cities in the United States. Our results suggest that the distribution of selected maps is fairly concentrated on those maps that contain spatial information about both the origin and the destination, the current location and the destination, and the transition between different important roads in a route. These results suggest that the choice of map scales should not follow a preset scale rule for diverse locations, and instead, it should be adaptive to the complexity of local roads and decision-making processes.