Proportional circle maps show quantity of a specific data, and it is divided in proportional sizes compared to the components. The owner of this map wanted to see which states use the most oil. They typed in their data on excel to calculate the size of each circle, and in Adobe Illustrator, created the circle representation of oil consumption in each state. There are many advantages of displaying a proportional circle map such as displaying a large data in a visual form that's easy to read to all viewers/media, minimal explanation, and the relatie proportion represents an accuracy of calculations. On the other hand, some disadvantages are that it does not reveal exact values, doesn't show change over time and other key details such as assumptions cause, effect, patterns.
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