Creating maps with great circle connections in R

Remember those charts of airline flight networks that FlowingData created last month?

In a follow-up post, Nathan Yau explains how he created those charts using R, with a step-by-step guide using the map function (from the maps package) to draw the maps, and the gcIntermediate function (from the geosphere package) to calculate the points along the great circle connecting pairs of cities. See the complete how-to guide and the associated R code at the link below.

FlowingData: How to map connections with great circles