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AVIZ - 2018

Section: New Results

A Model of Spatial Directness in Interactive Visualization

Participants : Stefan Bruckner [University of Bergen, Norway] , Tobias Isenberg [correspondant] , Timo Ropinski [Ulm University, Germany] , Alexander Wiebel [Hochschule Worms University of Applied Sciences, Germany] .

Figure 7. Illustration of the model of spatial directness.

We discussed the concept of directness in the context of spatial interaction with visualization. In particular, we proposeed a model (see Figure 7) that allows practitioners to analyze and describe the spatial directness of interaction techniques, ultimately to be able to better understand interaction issues that may affect usability. To reach these goals, we distinguished between different types of directness. Each type of directness depends on a particular mapping between different spaces, for which we consider the data space, the visualization space, the output space, the user space, the manipulation space, and the interaction space. In addition to the introduction of the model itself, we also showed how to apply it to several real-world interaction scenarios in visualization, and thus discussed the resulting types of spatial directness, without recommending either more direct or more indirect interaction techniques. In particular, we demonstrated descriptive and evaluative usage of the proposed model, and also briefly discussed its generative usage.

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