The New York Public Library has released more than 20,000 high resolution cartographic works (maps!) for free, to view and download. "We believe these maps have no known US copyright restrictions." All can be viewed through the New York Public Library’s Digital Collections page and downloaded through their Map Warper. (Via) [more inside]
Music Machinery presents a map of each U.S. state's most distinct favorite band or recording artist, as well as an app for playing with the data.
Here you will find one of the greatest historical atlases: Charles O. Paullin and John K. Wright's Atlas of the Historical Geography of the United States, first published in 1932. This digital edition reproduces all of the atlas's nearly 700 maps. Many of these beautiful maps are enhanced here in ways impossible in print, animated to show change over time or made clickable to view the underlying data—remarkable maps produced eight decades ago with the functionality of the twenty-first century.
By the creator of the California Rail Map, and inspired by ideas from various agencies and advocacy groups: A Map of the US High Speed Rail System
"The U.S. Geological Survey has just released more than 161,000 digitally scanned historical maps spanning in excess of 130 years and covering the lower 48 states. This Historical Topographic Map Collection provides a comprehensive repository of the landscape of our Nation..."
Radical Cartography has made a lot more maps since greasy_skillet posted it in 2005, including maps showing housing prices and segregation of all kinds in New York, Chicago, DC and elsewhere, counties named for Presidents, the night sky, the US in agriculture, the US as projected to other spots on the globe, and a physical atlas of the world.
Make a Map is a website that lets you create your own maps of the US and areas thereof using various demographics data. It's still in beta stage but it's got all of the US (at least everywhere I've thought to look) and so far has datasets for median household income, population change 2000-9, population density, median home value, unemployment rate, average household size and median age. It's fun to use and taught me a great deal about my home city. The sitemaker, ESRI, also has a pretty good free globe map software, ArcGIS Explorer, for which you download map layers and add-ins.
Researcher uses data regarding connections on facebook to map distinct regions of the United States.
Red vs. Blue and Political Self-Segregation:
“Republicans and Democrats joke these days that they can’t understand each other, that they feel as though they live on different planets. It’s no joke. They do. One of the reasons American politics is so bitter is that Republicans and Democrats are less likely today to live in the same community than at any time in the last 55 years.”The Austin-American Statesman’s Bill Bishop begins a series of articles on the increasing political segregation across the US—a variety of segregation that has surprisingly increased while others (for example, racial) have declined. Timothy Noah of Slate has some thoughts. For background, it’s been discussed elsewhere that the traditional 2000 election red vs. blue state map is misleading and that a gradated county map might be more enlightening. Here’s one. Here’s an analysis with a different take on the data. And here are some other interesting cartograms of that election’s results. [Alternative Links Inside]