The latest map to go viral is Robert Szucs’s dramatic and colourful map of the U.S. river basins. It’s even more spectacular in high resolution. Made with QGIS, the map separates river basin by colour and assigns stream thickness by Strahler number. I do have a couple of quibbles. The map doesn’t distinguish between the Hudson Bay and Atlantic watersheds: the Great Lakes and Red River basins are coloured the same way. And speaking of the Great Lakes, I have no idea why they look like ferns here. The map is available for sale on Etsy, along with similar maps of other countries, continents and regions. Daily Mail coverage.