Visualizing flows between multiple geographic locations on a traditional map can be a challenging visualization task, as occlusion or hairball and similar problems are hard to avoid. For this purpose various other, more abstract visualization approaches exist, to allow the comparison of flows. Most of those are summarized under the term OD (origin-destination) visualizations. To make those visualization more accessible and easier to implement i wrote a d3 plugin that can turn a data-set into any of the below described visualizations.
The layout-plugin is available on GitHub.