A Continuously Variable Proportional Circle map is a type of map in which circles of many different sizes and colors represent some set of data. In most cases the cartographer will use larger circles to represent the largest set of data being observed. A larger circle tends to represent a larger data value. Population size is not the only thing that can be inferred from a look at these maps - the continuously variable maps also use different colors within each circle to represent some set of information even further than just population size. These maps are very useful in situations where a cartographer wishes to show information such as major industries within a certain population of a country, etc.
In the Continuously Variable Proportional Circle map shown, the major industries of Germany are shown. It is clear that in the most heavily populated area, iron and steel and machinery and metal working are the most common industries.
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