Bubble maps place proportionally sized circles on geographic regions to compare quantities across locations. They are ideal when you need to show both where something occurs and how much of it there is.
This sample displays United States national parks on a USA map with bubble size based on 2014 visitor volume. Each bubble is labeled with the park name. A custom jQuery-powered hover panel shows a park photo, establishment date, area, visitor count, and a text description for every location. The chart also includes interactive zoom controls.
See the Bubble Map documentation for all configuration options.