In this paper, we discuss foundations, requirements and first experiences with a mobile information system that supports, and is ecologically compatible with, human vision-based navigation and acquirement of spatial knowledge during movement through the physical world. The appliance assists a person finding his/her way from an origin to a destination by providing an egocentric (viewer-centered) rather than an abstract top-down map-type view of the surrounding environment. We illustrate the use of the application in a foreign, or partially familiar, built environment of the scale of a small town or university campus and discuss first field experiments exploring egocentric way-finding support.
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