Proportional Circle Map

   http://www.stratasan.com/bad-maps-apples-map-app-and-poor-cartographic-design/badmap_capitals/

This is a proportional circle map. Here, the relative size of the circles are used to represent the varying populations in each states capitol city. Small circles indicate smaller populations in capitol cities, while larger circles indicate higher populations. From viewing this map we can determine that Indianapolis and Phoenix are two of the most highly populated capitol cities, while Pierre, South Dakota and Montpelier, Vermont have two of the smaller populations in capitol cities in the United States.