David J. Cowperthwaite

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This paper discusses visual information representation from the perspective of human comprehension. The distortion viewing paradigm is an appropriate focus for this discussion as its motivation has always been to create more understandable displays. While these techniques are becoming increasingly popular for exploring images that are larger than the(More)
As the use of 3D information presentation becomes more prevalent the need for effective viewing tools grows accordingly. Much work has been done in developing tools for 2D spaces which allow for detail in context views. We examine the extension of such 2D methods to 3D and explore the limitations encountered in accessing internal regions of the data with(More)
A fundamental issue in user interface design is the effective use of available screen space, commonly referred to as the screen real estate problem. This paper presents a new distortion-based viewing tool for exploring large information spaces through the use of a three-dimensional pliable surface. Arbitrarily-shaped regions (foci) on the surface may be(More)
It is a diicult problem to display large, complex graphs in a manner which furthers comprehension. A useful approach is to expand selected sections (foci) of the graph revealing details of subgraphs. If this expansion is maintained within the context of the entire graph, information is provided about how subgraphs are embedded in the overall structure.(More)
This paper presents the creation of a a visual environment for exploring landscape patterns and changes to such patterns over time. Dynamic landscape patterns can involve both spatial and temporal complexity. Exploration of spatio-temporal landscape patterns should provide the ability to view information at diierent scales to permit navigation of a vast(More)