Presenting Route Instructions on Mobile Devices: From Textual Directions to 3D Visualization

Publisher Summary This chapter reviews several means of presenting route instructions to a mobile user. It highlights some general considerations for presentations on mobile devices and discusses the process of generating route instructions, presenting route instructions, and technical issues associated with presenting route information in 3D. To produce a presentation that is appropriate for the current situation, it is necessary to adapt it to situational factors such as the currently available resources or the quality of the available positional information. Especially, when generating a presentation on mobile devices, two types of resources are of special importance: (1) Technical resources including factors such as speed, bandwidth and screen resolution and (2) The cognitive resources of the user that impact the way that information should be presented to the user. In addition to cognitive and technical resources, the user's current position is not only a key factor in determining the kind of situation a mobile user is in but also highly relevant in the context of generating and presenting route instructions. For example, knowing the user's current location is vital if the beginning of a route corresponds to his/her current location, which frequently occurs in the case of a mobile user.

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