A Growing Ink Blot Map of World Population Density

Most of our world maps are created with geographic and legal boundaries dictating how they are drawn… it’s highly useful for getting around the block, but hardly tells the whole tale of what is going on. What really matters much of the time? It’s all about where the people are… and this map shows only that.

Visualizing US Expansion Through Post Offices

While today you might have to study Twitter, Facebook or peoples IP addresses to determine where they live and travel, this visualization of westward expansion in the US between 1700 and 1900 looks at the most popular social network of the day: the post office. To create the graphic, map obsessed Derek Watkins took data from the USPS Postmaster Finder and found latitude/longitude coordinates extracted from place names checked with the USGS.