171 research outputs found
Interactive Visualisation of Hierarchical Quantitative Data: An Evaluation
We have compared three common visualisations for hierarchical quantitative
data, treemaps, icicle plots and sunburst charts as well as a semicircular
variant of sunburst charts we call the sundown chart. In a pilot study, we
found that the sunburst chart was least preferred. In a controlled study with
12 participants, we compared treemaps, icicle plots and sundown charts. Treemap
was the least preferred and had a slower performance on a basic navigation task
and slower performance and accuracy in hierarchy understanding tasks. The
icicle plot and sundown chart had similar performance with slight user
preference for the icicle plot.Comment: Presented at IEEE VIS 2019 in Vancouver, Canada and included in the
VIS 2019 conference proceedings. Improved the image quality in the pape
Visualising Geographically-Embedded Origin-Destination Flows: in 2D and immersive environments
This thesis develops and evaluates effective techniques for visualisation of
flows (e.g. of people, trade, knowledge) between places on geographic maps.
This geographically-embedded flow data contains information about geographic
locations, and flows from origin locations to destination locations. We
explored the design space of OD flow visualisation in both 2D and immersive
environments. We do so by creating novel OD flow visualisations in both
environments, and then conducting controlled user studies to evaluate different
designs.Comment: PhD Thesis, Monash University, Australia, December 2018. Update:
corrected typos in arXiv comment
Is Embodied Interaction Beneficial? A Study on Navigating Network Visualizations
Network visualizations are commonly used to analyze relationships in various
contexts. To efficiently explore a network visualization, the user needs to
quickly navigate to different parts of the network and analyze local details.
Recent advancements in display and interaction technologies inspire new visions
for improved visualization and interaction design. Past research into network
design has identified some key benefits to visualizing networks in 3D versus
2D. However, little work has been done to study the impact of varying levels of
embodied interaction on network analysis. We present a controlled user study
that compared four environments featuring conditions and hardware that
leveraged different amounts of embodiment and visual perception ranging from a
2D visualization desktop environment with a standard mouse to a 3D
visualization virtual reality environment. We measured the accuracy, speed,
perceived workload, and preferences of 20 participants as they completed three
network analytic tasks, each of which required unique navigation and
substantial effort. For the task that required participants to iterate over the
entire visualization rather than focus on a specific area, we found that
participants were more accurate using a VR and a trackball mouse than
conventional desktop settings. From a workload perspective, VR was generally
considered the least mentally demanding and least frustrating in two of our
three tasks. It was also preferred and ranked as the most effective and
visually appealing condition overall. However, using VR to compare two
side-by-side networks was difficult, and it was similar to or slower than other
conditions in two of the three tasks. Overall, the accuracy and workload
advantages of conditions with greater embodiment in specific tasks suggest
promising opportunities to create more effective environments in which to
analyze network visualizations.Comment: Accepted by the Information Visualization journa
Visualizing and Interacting with Geospatial Networks:A Survey and Design Space
This paper surveys visualization and interaction techniques for geospatial
networks from a total of 95 papers. Geospatial networks are graphs where nodes
and links can be associated with geographic locations. Examples can include
social networks, trade and migration, as well as traffic and transport
networks. Visualizing geospatial networks poses numerous challenges around the
integration of both network and geographical information as well as additional
information such as node and link attributes, time, and uncertainty. Our
overview analyzes existing techniques along four dimensions: i) the
representation of geographical information, ii) the representation of network
information, iii) the visual integration of both, and iv) the use of
interaction. These four dimensions allow us to discuss techniques with respect
to the trade-offs they make between showing information across all these
dimensions and how they solve the problem of showing as much information as
necessary while maintaining readability of the visualization.
https://geonetworks.github.io.Comment: To be published in the Computer Graphics Forum (CGF) journa
Data-driven Storytelling in Hybrid Immersive Display Environments
Data-driven stories seek to inform and persuade audiences through the use of
data visualisations and engaging narratives. These stories have now been highly
optimised to be viewed on desktop and mobile computers. In contrast, while
immersive virtual and augmented reality (VR/AR) technologies have been shown to
be more persuasive, no clear standard has yet emerged for such immersive
stories. With this in mind, we propose that a hybrid data-driven storytelling
approach can leverage the familiarity of 2D display devices with the
immersiveness and presence afforded by VR/AR headsets. In this position paper,
we characterise hybrid data-driven stories by describing its design
opportunities, considerations, and challenges. In particular, we describe how
both 2D and 3D display environments can play either complementary or symbiotic
roles with each other for the purposes of storytelling. We hope that this work
inspires researchers to investigate how hybrid user interfaces may be used for
storytelling
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