Let’s Make a MapNote: This article was written in 2012 and uses old versions of D3 and TopoJSON. I recommend you read my newer tutorial, Command-Line Cartography, instead! In this tutorial, I’ll cover how to make a modest map from scratch using D3 and TopoJSON. I’ll show you a few places where you can find free geographic data online, and how to convert it into a format that is both efficient and convenient for d
