visual: d3-scale(.js), d3-time, d3-format, d3-shape

Introducing d3-scale — Medium by Mike Bostock, creator of D3.js

d3/d3-scale @ GitHub

new D3 modules: d3-time,d3-format, and d3-shape.

"scales", chapter 7 of book "Interactive Data Visualization for the Web" by Scott Murray