Abstract
Tag clouds are widely applied, popular visualization techniques as they illustrate summaries of textual data in an intuitive, lucid manner. Many layout algorithms for tag clouds have been developed in the recent years, but none of these approaches is designed to reflect the notion of hierarchical distance. For that purpose, we introduce a novel tag cloud layout called TagSpheres. By arranging tags on various hierarchy levels and applying appropriate colors, the importance of individual tags to the observed topic gets assessable. To explore relationships among various hierarchy levels, we aim to place related tags closely. Various usage scenarios from the digital humanities, sports, aviation and natural disaster management point out the benefit of TagSpheres for different domains. In addition, we highlight that TagSpheres is also a novel layout approach for tree structures.
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Notes
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Bible genealogy data taken from BibleFamilyTree.info, Copyright © 2013 by The Psalm 119 Foundation. Used by permission. (http://www.ThePsalm119Foundation.org).
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Acknowledgements
The authors thank Judith Blumenstein for preparing the digital humanities use cases. This research was funded by the German Federal Ministry of Education and Research.
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Jänicke, S., Scheuermann, G. (2017). On the Visualization of Hierarchical Relations and Tree Structures with TagSpheres. In: Braz, J., et al. Computer Vision, Imaging and Computer Graphics Theory and Applications. VISIGRAPP 2016. Communications in Computer and Information Science, vol 693. Springer, Cham. https://doi.org/10.1007/978-3-319-64870-5_10
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