My friend Leslie Graham just sent me a link to a wonderful map resource: "Data Visualization: Journalism's Voyage West." Part of Stanford University's Rural West Initiative, the site tracks the spread of newspapers into the American interior and the West. "With the American newspaper under stress from changing economics, technology and consumer behavior," notes the introduction, "it's easy to forget how ubiquitous and important they are in society. For this data visualization, we have taken the directory of US newspaper titles compiled by the Library of Congress' Chronicling America project--nearly 140,000 publications in all--and plotted them over time and space."
David Letterman at the 1971 Indy 500
1 hour ago