Making of: comparative treemaps

(or “the incredible shrinking treemap” HT @albertocairo).

Treemaps are a really useful way to understand hierarchical data, but they are not well-suited to side by side comparison.

Recently I’ve been working on the World Bank’s Atlas of the Sustainable Development Goals 2017 (which was a large team effort). One highlight that I worked on was a comparative treemap / cartogram of people living in extreme poverty, which is a bit different from the typical treemap.

Here’s one version, an animated GIF that Tariq Khokhar captured (you can see the interactive timeline here):