Google API add-on lets you make heat maps inside a Google Map portal!
HeatMapAPI can be used over the Internet or as a .NET DLL that runs in a local environment and allows you to integrate heat map images into Google Maps or other GIS systems. In this post we’re going to use HeatMapAPI to visualize the density of recent Starbucks store closures. In a recent statement, Starbucks announced the closure of 600+ stores in the United States due to economic conditions.
In other news, we’d like to thank Starbucks for providing their easily-parsed list of closures. Most visualizations I’ve seen are using this dataset.