An interesting post on Google’s Inside Book Search blog, where Matthew Gray crunches the numbers in Google Book Search to create a really interesting map: “I wanted to show the Earth viewed from books, where individual mentions of locations in books combine to yield another interpretation of the globe. The intensity of each pixel is proportional to the number of times the location at a given set of coordinates is mentioned across all of the books in Google Books Search.” See also the maps by decade for the 19th century. Via Science Library Pad.