Non-overlapping aggregated multivariate glyphs for moving objects

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Abstract

In moving object visualization, objects and their attributes are commonly represented by glyphs on a geographic map. In areas on the map densely populated by these objects, visual clutter and occlusion of glyphs occur. We propose a method to solve this problem by partitioning the set of all objects into subsets that are each visualized using an aggregated multivariate glyph that shows the distribution of several attributes of its objects, such as heading, type and velocity. We choose the combination of subsets and glyph design such that the glyphs do not overlap and the number of subsets is approximately maximal. The partition is maintained and updated while the objects move. We use examples from the maritime domain, but our method is applicable to a wider range of dynamic data. Through a user study we find that, for a set of representative tasks, our method does not perform significantly worse than competitive visualizations with respect to correctness. Furthermore, it performs significantly better for density comparison tasks in high density data sets. We also find that the participants of the user study have a preference for our method.
Original languageEnglish
Title of host publication2014 IEEE Pacific Visualization Symposium (PacificVis, Yokohama, Japan, March 4-7, 2014)
Place of PublicationPiscataway
PublisherIEEE Computer Society
Pages17-24
ISBN (Print)978-1-4799-2873-6
DOIs
Publication statusPublished - 2014
Event7th IEEE Pacific Visualization Symposium (PacificVis 2014) - Yokohama, Japan
Duration: 4 Mar 20147 Mar 2014
Conference number: 7
http://www.fj.ics.keio.ac.jp/pvis2014/

Conference

Conference7th IEEE Pacific Visualization Symposium (PacificVis 2014)
Abbreviated titlePacificVis 2014
CountryJapan
CityYokohama
Period4/03/147/03/14
Internet address

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