Daniel Huffman, author of the Cartastrophe blog about bad map design and — more recently — the map of profanity on Twitter, not only has a new blog called somethingaboutmaps, but his most recent mapping project is a series of maps of river systems done in the style of diagrammatic transit maps — for example, the map of the Mississippi River system, above. Via @axismaps, @beyondmaps and Cartogrammar.

Previously: Cartastrophe, a Blog About Bad Maps; Mapping Profanity on Twitter.