This continuously variable proportional circle map has been published by the New York Times to show human West Nile Virus cases across the United States. The varied sizes of the circles relate to the specific number of cases (measured variable) in each state. If you consider how much water and mosquitoes we have in Florida, it looks like we were pretty lucky for this particular season and Colorado got slammed. The numbers and circles really stand out at this size but I would be interested to see the original printed version and if it would be this clear. http://mapmaker.rutgers.edu/355/links.html
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