Continuously Variable Proportional Circle Map

https://www.e-education.psu.edu/geog486/book/export/html/1796

This is an example of a continuously variable proportional circle map because the circles represent multiple variables, as opposed to the typical proportional circles map. For this image, the size of the circles represent the amounts of meat that these particular areas of France shipped off to the butchers in Paris. In addition for this map, the circles are also represented in pie chart form that show the types of meat and how much was shipped off.