Last month, the folks over at FlowingData.com, a blog on data visualization, came up with a new “Visualize This” challenge, encouraging readers to come up with interactive maps, graphs and other tools using Tax Freedom Day data. Alex Lundry, who had previoulsy created a few interactive infographics on Tax Freedom Day, had his 4-D map featured on the site. Click here to see all of the visualizations that were featured. Here’s a sample of them: An interactive dashboard using Tableau Software: An interactive calendar interface: An online dashboard tool: And, a graph showing the correlation between Tax Freedom Day and poverty: