PDA-Assisted Indoor-Navigation with Imprecise Positioning: Results of a Desktop Usability Study

  • Hartwig H. Hochmair
Part of the Lecture Notes in Geoinformation and Cartography book series (LNGC)


Although most of today’s navigation systems are used for guidance of cars, recent progress in mobile computing made it possible for research and industry to develop various prototypes of indoor-navigation systems in combination with PDAs. Independent of the presentation mode of route instructions, it is desirable that such real-time route guidance system automatically delivers the correct piece of information to the user at the right time. This requires that the PDA knows the user’s position and orientation, which is not always available due to technical limitations of indoor sensing and positioning techniques, and potential signal dropouts. Using a desktop usability study, this chapter extends previous work on route instructions with mobile devices. The study explores the preferred modes of interaction between user and PDA in case of diluted position and orientation accuracies.


Mobile Device Prefer Option Orientation Error Direction Arrow Route Description 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Hartwig H. Hochmair
    • 1
  1. 1.Department of GeographySaint Cloud State UniversityUSA

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