Have a set of data that you want to visualize on a map? With OpenHeatMap, anyone can create customized heat maps using their own data. A heat map is a way to represent data that uses color to represent the data values in a two-dimensional map.
OpenHeatMap was created by Pete Warden in 2010 and aims to “transform data from a traditional data source such as a spreadsheet into an interactive animated view of a particular area.” Check out some sample maps from their online gallery. As O’Reilly Media’s Alex Howard notes, OpenHeatMap “has the potential to make public data relevant to the lay user.”