Authors:
Alberto Debiasi
;
Bruno Simões
and
Raffaele De Amicis
Affiliation:
Fondazione Graphitech, Italy
Keyword(s):
3D Geovisualization, Edge Congestion, Interactive Visualization, Graph Layout, Distortion Lens.
Related
Ontology
Subjects/Areas/Topics:
Abstract Data Visualization
;
Computer Vision, Visualization and Computer Graphics
;
General Data Visualization
;
Gpu-Based Visualization
;
Graph Visualization
;
Information and Scientific Visualization
;
Interactive Visual Interfaces for Visualization
;
Spatial Data Visualization
;
Visual Data Analysis and Knowledge Discovery
;
Visual Representation and Interaction
Abstract:
Geographic datasets such as international telecommunications traffic, financial flows, trading patterns, and
national migration patterns describe the movement of entities between geographical locations. In spatial relations
analyses the exact route of the connections is not important. Hence, one of the most preferred methods
for its depiction is a graph representation with data nodes layered over a geographical surface (such as a flat
map or a virtual globe). However, a large number of arcs can produce dense visual clutters that make difficult
the extraction of information from: occluded geographical surfaces, occluded nodes and occluded arcs. In this
work we present a novel focus+context technique for 3D virtual environments that interactively distorts and
filters arcs layouts, revealing underneath information about the three aforementioned visual elements: nodes,
arcs and geographical surface. Moreover, changing the camera does not affect the geographical focus of the
lens. In our
use cases, we observed that such technique is an advantage for tasks that include the exploration
of geographical networks.
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