Information Aesthetics comes through again, this time finding a fantastic visualization of US Trade Surpplus & Deficit. From the author:
I did spend a fair amount of time working on a simple algorithm that represents the flow of cash as various weighted lines for each country (as shown in the top right legend.) Visually I believe you can get a rough at-a-glance view of how much cash is flowing from each country, while still having enough fidelity at the lower volumes to discern differences between those volumes, since in essence it is a log scale in stroke weights.
US Trade Surplus and Deficit Visualized – information aesthetics.
