When Does Crime Happen
Joe Golike and Sha Hwang of Trulia take a deeper look at when crime typically happens throughout the day in 25 big cities across the United States. The result, When does crime happen? is a set of interactive stacked area charts that allow for detailed comparison between different types of crimes and high-level comparison between different cities. On hover, a tooltip reveals more detailed information and the percentage of reported crimes per type and hour. I think the small multiples work pretty fine for comparison over cities and the charts show the data in a readable and elegant way. The visualization is built in HTML5 using Protovis and the underlying data comes from SpotCrime. Read more about their findings on the Trulia Insights blog.
Trulia Blog: When Does Crime Happen?