"Envisioning Development: What is Affordable Housing?" is an interactive Flash-based map of housing and income statistics on a neighborhood-by-neighborhood basis throughout the New York City area. Although I've seen similar statistical/analytical interactive maps with similar data plenty of times, the aesthetic design and information visualization "impact" of this map is almost breathtaking. This map is part of an online resource toolkit for urban planning and land use education based around NYC, offered by the Center for Urban Pedagogy.
The New York Times, known for some first-class infographics and data visualizations, released this thought-provoking map of food stamp usage in the United States, on a county-by-county basis. In addition to the county-level statistics, there are a number of call-outs and a related article.
One feature I thought was interesting, in addition to the elegant interactive map, was the sortable data table view of the underlying dataset. Even cooler, if you don't feel like using the sortable dataset, the designers of the infographic have helpfully provided a link to download the raw underlying data itself in CSV format, so that you can analyze it yourself in OpenOffice.org Calc or Microsoft Excel! Three cheers for open journalism.
This is a very useful interface allowing visitors to visualize all U.S. records of cancer deaths over a 50-year period. Epidemiologists and others can drill down to the county level, selecting from dozens of different types of cancer. Data can be output in a variety of formats, including static image for copying and interactive Flash maps.
The Map Kibera project is an awesome example of community-powered mapping succeeding in a situation where commercial mapping providers would never venture: Kibera, the largest slum of Nairobi, Kenya with a population estimated at near a million. The project will train local residents to create community maps - using OpenStreetMap tools and techniques - and encourage the use of community-generated maps in relief and development efforts.
When people refer to "heat maps," they can be referring to spectrum-colored maps of values (e.g., maps that show red, yellow, green, etc., based on a range of values), or actual maps of the weather (such as on the back page of USA Today :). In this post, we'll be examining both: heat maps of heat, so to speak.