Jenks Natural Breaks scale

[wahlatlas]

d3.js unfortunately lacks the Jenks Natural Breaks as a scale for choropleth maps.
There is a very well documented implementation of the algorithm available at
https://github.com/simple-statistics/simple-statistics

you can read more about the background story at
http://www.macwright.org/2013/02/18/literate-jenks.html

and see it in action
https://www.destatis.de/zensuskarte/index.html

[floledermann]

See also: https://stat.ethz.ch/R-manual/R-devel/library/base/html/pretty.html