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A chord diagram is a graphical method of displaying the inter-relationships between data in a matrix. The data is arranged radially around a circle with the relationships between the points typically drawn as arcs connecting the data together.
The format can be aesthetically pleasing, making it a popular choice in the world of data visualization.
Chord diagrams are also known as radial network diagrams or circular layouts.
Hierarchical Edge Bundling
While a small amount of data could be represented in a circular diagram using straight lines to show the interconnections, a diagram featuring numerous lines would quickly become illegible. To reduce the visual complexity, chord diagrams employ a technique called hierarchical edge bundling.
- Holten, Danny (SEPTEMBER/OCTOBER 2006). "Hierarchical Edge Bundles: Visualization of Adjacency Relations in Hierarchical Data". IEEE Transactions on Visualization and Computer Graphics (IEEE Computer Society) 12 (5). ISSN 1077-2626. Check date values in:
- http://circos.ca/ Ciros
- Hierarchical Edge Bundling is the technique by which the lines connect nodes together are grouped to reduce visual clutter.