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Orthogonal Voronoi Diagram and Treemap [article]

Yan-Chao Wang and Feng Lin and Hock-Soon Seah
2019 arXiv   pre-print
In this paper, we propose a novel space partitioning strategy for implicit hierarchy visualization such that the new plot not only has a tidy layout similar to the treemap, but also is flexible to data  ...  To the best of our knowledge, it is the first time to use a sweepline-based strategy for the Voronoi treemap.  ...  Introduction Hierarchical data visualization plays an essential role in the field of information visualization since hierarchical data structures are quite common in our daily life, including file systems  ... 
arXiv:1904.02348v1 fatcat:lnqv2xspv5hllkglvol26xpkpi

Hybrid-Treemap Layouting [article]

Sebastian Hahn, Jürgen Döllner
2017 Eurographics Conference on Visualization  
Based on a number of identified edge cases, we propose a combination of these different layout algorithms, individually selected for and applied on each sub hierarchy of the given treemap data.  ...  To this end, we analyze shortcomings of state-of-the-art treemap algorithms such as Moore, Voronoi and Strip layouts.  ...  This work was funded by the Federal Ministry of Education and Research (BMBF), Germany, within the "BIMAP" project. We also want to thank seerene TM for providing us access to their massive data sets.  ... 
doi:10.2312/eurovisshort.20171137 dblp:conf/vissym/0003D17 fatcat:uk7iqyhx3jdszeltaygyinyuuu

Voronoi trees for hierarchical in-network data and space abstractions in wireless sensor networks

Mohamed M. Ali Mohamed, Ashfaq A. Khokhar, Goce Trajcevski
2013 Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems - MSWiM '13  
We show how hierarchical data and space abstractions can be used to represent Voronoi Cell based partitions of the sensing field and use Voronoi Trees to efficiently map the hierarchical abstractions for  ...  We address the problem of spatial queries in Wireless Sensor Networks (WSN) via hybrid overlays, where the data values may correspond to different physical phenomena and sensors may be correlated with  ...  An orthogonal bisection based KD tree implementation in SIDnet (cf. [3] ) was used to compare the performance of Voronoi treemaps.  ... 
doi:10.1145/2507924.2507999 dblp:conf/mswim/MohamedKT13 fatcat:t4qixawqznhevopuf4ojrovxwa

Cabinet Tree: an orthogonal enclosure approach to visualizing and exploring big data

Yalong Yang, Kang Zhang, Jianrong Wang, Quang Vinh Nguyen
2015 Journal of Big Data  
Treemaps are well-known for visualizing hierarchical data. Most related approaches have been focused on layout algorithms and paid little attention to other display properties and interactions.  ...  Furthermore, the structural information in conventional Treemaps is too implicit for viewers to perceive.  ...  Voronoi Treemap uses polygons to replace rectangles in subdivision to enhance the visual presentation of the hierarchical structures [14] .  ... 
doi:10.1186/s40537-015-0022-3 fatcat:rs2kdbh7vnb7tcnu5vljpqwmym

Improving Layout Quality by Mixing Treemap-Layouts Based on Data-Change Characteristics [article]

Joseph Bethge, Sebastian Hahn, Jürgen Döllner
2017 International Symposium on Vision, Modeling, and Visualization  
For this, the proposed approach uses a neural network which is trained on artificially generated dataset,s containing a total of 15.8 million samples.  ...  This approach is evaluated on real-world data from 100 publicly available software repositories. Compared to other state-of-the-art treemap algorithms it reaches an overall better result.  ...  This work was funded by the Federal Ministry of Education and Research (BMBF), Germany, within the "BIMAP" project. We also want to thank seerene TM for providing us access to their massive data sets.  ... 
doi:10.2312/vmv.20171261 dblp:conf/vmv/Bethge0D17 fatcat:bdyxamffyfcllgzh3i4k5rdbqi

The Design Space of Implicit Hierarchy Visualization: A Survey

H-J Schulz, S Hadlak, H Schumann
2011 IEEE Transactions on Visualization and Computer Graphics  
In this paper, we survey the design space for this class of visualization techniques.  ...  Index Terms-information visualization, hierarchy visualization, treemaps, visualization design space, rapid visualization prototyping. !  ...  ACKNOWLEDGMENTS The authors would like to thank the anonymous reviewers for their helpful comments and suggestions.  ... 
doi:10.1109/tvcg.2010.79 pmid:20498508 fatcat:3roepvdbxre4xbhz74i7n4cppu

Hierarchical data visualization using a fast rectangle-packing algorithm

T. Itoh, Y. Yamaguchi, Y. Ikehata, Y. Kajinaga
2004 IEEE Transactions on Visualization and Computer Graphics  
This paper presents two rectangle-packing algorithms for placing items of hierarchical data onto display spaces.  ...  This paper presents a technique for the representation of large-scale hierarchical data which aims to provide good overviews of complete structures and the content of the data in one display space.  ...  Space-Filling Visualization A Treemap [11] , which represents hierarchical data in a manner like nested column charts, is a well-known spacefilling approach for hierarchical data visualization.  ... 
doi:10.1109/tvcg.2004.1272729 pmid:18579961 fatcat:hjlevooqwbde3jpqvhrlgoijcu

Indented Pixel Tree Browser for Exploring Huge Hierarchies [chapter]

Michael Burch, Hansjörg Schmauder, Daniel Weiskopf
2011 Lecture Notes in Computer Science  
data sets.  ...  In this paper we introduce the Indented Pixel Tree Browser-an interactive tool for exploring, annotating, and comparing huge hierarchical structures on different levels of granularity.  ...  Kay Nieselt, University of Tübingen, for providing the NCBI taxonomy data set.  ... 
doi:10.1007/978-3-642-24028-7_28 fatcat:bl2hvetrdjgrjilhxeic6l6xpi

Quantitative Comparison of Time-Dependent Treemaps [article]

Eduardo Vernier, Max Sondag, Joao Comba, Bettina Speckmann, Alexandru Telea, Kevin Verbeek
2020 arXiv   pre-print
Rectangular treemaps are often the method of choice to visualize large hierarchical datasets.  ...  To this end, we perform an extensive quantitative evaluation of rectangular treemaps for time-dependent data.  ...  Introduction Treemaps are one of the best-known methods for visualizing large hierarchical datasets.  ... 
arXiv:1906.06014v2 fatcat:qmgezrbsqnferh2pf3ku65gkny

Visualization of Generalized Voronoi Diagrams [article]

Alexandru Telea, Jarke J. Van Wijk
2001 EUROVIS 2005: Eurographics / IEEE VGTC Symposium on Visualization  
Voronoi diagrams are an important data structure in computer science.  ...  Its real-time performance makes it suitable for interactive planning and analysis of complex Voronoi configurations in 2D.We illustrate the method for different combinations of metrics and site shapes.  ...  We present a new visualization method for two generalizations of the Voronoi diagrams.  ... 
doi:10.2312/vissym/vissym01/165-174 fatcat:wdejyszug5h63k65ak3nsc4ukq

Visualization of Generalized Voronoi Diagrams [chapter]

Alexandru Telea, Jarke J. van Wijk
2001 Eurographics  
Voronoi diagrams are an important data structure in computer science.  ...  Its real-time performance makes it suitable for interactive planning and analysis of complex Voronoi configurations in 2D.  ...  We present a new visualization method for two generalizations of the Voronoi diagrams.  ... 
doi:10.1007/978-3-7091-6215-6_18 fatcat:cgqvl4mpvbdprohr4eig2knd2u

Text mapping: Visualising unstructured, structured, and time-based text collections

Vedran Sabol, Keith Andrews, Wolfgang Kienreich, Michael Granitzer, Joachim Hasebrook
2008 International Journal of Intelligent Decision Technologies  
Tools from the field of information visualisation are being used to help users make sense of and extract useful knowledge from such collections.  ...  This paper gives an overview of text mapping techniques. from the documents' contents, the visualisation process can make use of the hierarchy to produce a better visualisation.  ...  Acknowledgments The Know-Center is funded within the Austrian COMET Program -Competence Centers for Excellent Technologies -under the auspices of the Austrian Ministry of Transport, Innovation and Technology  ... 
doi:10.3233/idt-2008-2204 fatcat:je5zlfn7nvdc7bz7rnenx4eqtm

Temporal Treemaps: Static Visualization of Evolving Trees

2018 IEEE Transactions on Visualization and Computer Graphics  
The concept of nested layouts, in particular treemaps [28] , is a wide-spread visualization approach for such trees.  ...  Existing visualization approaches for such data include animated 2D treemaps, where the dynamically changing layout makes it difficult to observe the data in its entirety.  ...  ACKNOWLEDGMENTS This work was supported through grants from the Swedish Foundation for Strategic Research (SSF) and the Swedish e-Science Research Centre (SeRC).  ... 
doi:10.1109/tvcg.2018.2865265 pmid:30137007 fatcat:w4etu7jxiba3fa7dhbvghnqi3e

Treemaps with Bounded Aspect Ratio [chapter]

Mark de Berg, Bettina Speckmann, Vincent van der Weele
2011 Lecture Notes in Computer Science  
Treemaps are a popular technique to visualize hierarchical data. The input is a weighted tree T where the weight of each node is the sum of the weights of its children.  ...  A treemap for T is a hierarchical partition of a rectangle into simply connected regions, usually rectangles.  ...  Introduction Treemaps are a very popular technique to visualize hierarchical data [12] .  ... 
doi:10.1007/978-3-642-25591-5_28 fatcat:vijyrdd72nbhdjwb57ojwapzby

Visualization of the Static Aspects of Software: A Survey

Pierre Caserta, O Zendra
2011 IEEE Transactions on Visualization and Computer Graphics  
However, visualizing software is not an easy task because of the huge amount of information comprised in the software.  ...  Human perception of information and cognitive factors must thus be taken into account to improve the understandability of the visualization.  ...  Another drawback of a Treemap is that the implicit hierarchical structure is hard to discern.  ... 
doi:10.1109/tvcg.2010.110 pmid:20733234 fatcat:oy37ekhbqbca5b6ekk3tsijbmq
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