Create a chord diagram between the frontiers and the sub-groups

[gordonwatts]

Start with the simplest:

• use the frontiers

Connections are how often each references another

If this works, add the subgroups within each frontier. This might take some careful doing b.c. there could be a mass of confusing small lines - e.g. the data is too fine-grained here.

Mouse over should get you basic info

• Category name
• (subcategory name)
• Number of LOI's in that sub-category

Could clicking get you further info? Like lists?

This came out of a suggestion from issue #47 (@cranmer).

[gordonwatts]

Stories: https://www.visualcinnamon.com/2014/12/using-data-storytelling-with-chord Some basic exploration: https://www.data-to-viz.com/graph/chord.html

[gordonwatts]

https://vega.github.io/vega-lite/examples/

[gordonwatts]

https://vega.github.io/vega-lite/tutorials/getting_started.html