Proportional Circle Maps are maps that utilize circles to map point data, as opposed to a dot, thus the size of the circle plays an important role in relation to the measured variable, and not necessarily the area over which it is measured. This map, drawn by Charles Joseph Minard in the 1850's depicts the amount of different types of meat that came from various regions and were sent to butcheries in Paris. Both area and variable (meat) play a significant role in this particular map, however, the measured variable, or amount of particular type of meat that is sent to Paris determines the size of the circle.
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