in this iteration, we use [Jenks Natural Breaks](http://www.macwright.org/2013/02/18/literate-jenks.html) with a [quantile](https://github.com/d3/d3-scale/blob/master/README.md#quantile-scales) scale to map values in the data to colors on the choropleth map

🎩 [@adamrpearce](https://twitter.com/adamrpearce) for [suggesting](https://d3js.slack.com/archives/help/p1474482256000307) [Jenks Natural Breaks](http://www.macwright.org/2013/02/18/literate-jenks.html) over in the [#help](https://d3js.slack.com/messages/help/) channel of the [d3js slack](https://d3-slackin.herokuapp.com/)

📄 [http://roadtolarissa.com/blog/2015/01/04/coloring-maps-with-d3/](http://roadtolarissa.com/blog/2015/01/04/coloring-maps-with-d3/)

do check out the other examples in this `world map` series:  

[world map 00 original example](https://bl.ocks.org/jeremycflin/b43ab253f3ae02dced07)  
[world map 01 fix tooltip value](https://bl.ocks.org/micahstubbs/01529b106c93f9b649c4006de5c79b80)  
[world map 02 d3 v4](https://bl.ocks.org/micahstubbs/8e15870eb432a21f0bc4d3d527b2d14f)  
[world map 03 es2015 + update code style](https://bl.ocks.org/micahstubbs/281d7b7a7e39a9b59cf80f1b8bd41a72)  
[world map 04 manual breaks + threshold scale](https://bl.ocks.org/micahstubbs/535e57a3a2954a129c13701fe61c681d)  
[world map 05 linear breaks + quantize scale](https://bl.ocks.org/micahstubbs/c14d8bda8e337da6c836a526ad1a7c5a)  
[world map 06 linear breaks + quantiles scale](https://bl.ocks.org/micahstubbs/536bc140537c1f90bf01f0bb9adc87b8)  
**world map 07 Jenks natural breaks**  
[world map 08 ckmeans cluster max breaks](https://bl.ocks.org/micahstubbs/9c2397c1da11c7b5d331653bcd475c1f)  
[world map 09 ckmeans cluster min breaks](https://bl.ocks.org/micahstubbs/c7f17dcbdc728e0d579d84e47c33dfa6)