Types of Maps

There are many types of maps. they all require marginal data and possibly a legend to maximize their usefulness.  Below are some common types of maps.

Isarithmic maps, also called contour maps, identify areas of smooth, continuous, univariant data and show the separation of such areas using isobars.  This one gives North Carolina's temperature on a given day.

Chlorpleth maps show aggregate statistical data for predefined areas such as counties or states by coloring or shading these regions.

Dot density maps use a single dot to represent a given quantity of the variable represented. All dots are the same size and represent equal quantities.  The more densely packed the dots are, the higher the quantity being represented.   This on identifies Public Safety installations.

Proportional symbol maps use a single symbol for a predefined area.  The symbol is sized proportionate to the quantity of the variable being measure.  This one illustrates wine consumption in Europe.

Prepared maps identify features of interest on a given landscape.  This one shows snowmobile trails in the Black Hills of South Dakota.