Topology-Preserving Off-screen Visualization: Effects of Projection Strategy and Intrusion Adaption
Dominik J\"ackle, Johannes Fuchs, Harald Reiterer

TL;DR
This paper investigates how different projection strategies and adaptive border intrusions in topology-preserving off-screen visualization affect user perception and understanding, proposing an orthographic projection for better topology reflection.
Contribution
It introduces an adaptive border intrusion method and compares radial and orthographic projection strategies, providing empirical evidence for their effects on topology preservation.
Findings
Orthographic projection improves topology reflection for unconnected point data.
Adaptive border intrusion enhances user perception of spatial relationships.
Participants preferred orthographic projection for better topology understanding.
Abstract
With the increasing amount of data being visualized in large information spaces, methods providing data-driven context have become indispensable. Off-screen visualization techniques, therefore, have been extensively researched for their ability to overcome the inherent trade-off between overview and detail. The general idea is to project off-screen located objects back to the available screen real estate. Detached visual cues, such as halos or arrows, encode information on position and distance, but fall short showing the topology of off-screen objects. For that reason, state of the art techniques integrate visual cues into a dedicated border region. As yet, the dimensions of the navigated space are not reflected properly, which is why we propose to adapt the intrusion of the border pursuant to the position in space. Moreover, off-screen objects are projected to the border region using…
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Taxonomy
TopicsData Visualization and Analytics · Data Management and Algorithms · Geographic Information Systems Studies
