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Core Visual Variables
Introduction
Clear and effective map design depends on your knowledgeable use of
visual variables for the representation of your map data. Visual variables
are graphic manipulations that symbolize data in a meaningful manner.
Essentially, visual variables are used to convey information about the nature
of data. Many of our abilities related to graphical interpretation are limited
by evolutionary constraints. Our brains have been hardwired throughout
time to interpret certain visual stimuli in particular ways. For example,
humans perceive darker color values as representing more of something
because in our environment ...