The last two exercises demonstrate the full process of producing a cartographic composition. Thematic maps usually have base-map information in the background, but the map reader's attention should focus on the designated theme.
Thematic maps use symbols to portray their chosen theme.
We will see many options for symbols in lecture and in the textbook. Each symbol type is appropriate in certain kinds of situations. Here we use one type of symbol, called the graduated circle . Graduated circles are circles that are sized in proportion to the amount of a variable at each location. Here we will size our circles in proportion to the number of students at each CSU campus.