Abstract
Advances in the technology for both dynamic visual representation and dissemination of those representations using the Internet are changing the way geoscientists access and apply geospatial and related data. Desktop geovirtual environments (GeoVEs) offer new ways to interactively display geospatial structures and phenomena for geovisualization. However, users have aggravating difficulties in utilizing the potentials of desktop GeoVEs because of navigation and wayfinding constraints. This chapter explains the design of graphical user interface methods that support navigation and orientation within desktop GeoVEs and facilitate user's wayfinding tasks. The egocentric perspective is the most natural form of human space perception and most desktop GeoVEs feature only a nonimmersive egocentric view on the geovirtual environment. Desktop GeoVEs have the ability to view spaces from an exocentric frame of reference that is independent of the observer's position and orientation. The chapter also examines the way in which an egocentric frame of reference is best extended with an exocentric frame of reference, and whether adding an exocentric frame of reference will significantly reduce navigation and wayfinding problems in desktop GeoVEs.
Published Version
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