Six Graphic Variables

By: Dave Melsness

Graphic Variables The six graphic variables displayed below are the cartographer’s key to success. How they are used determines the e�ectiveness of a graphic, or in this case a map, and how easily it is interpreted by the audience. Refer to the chart below and consider the data you wish to display with each before determining which graphic variable and symbolization (point, line, polygon/area) is most suitable.

? L %

Point Line Polygon/Area

Shape

Pa�ern/Texture

Orientation

Value

Color

Size Not E�ective

Ord

ered

Di�

eren

tiat

ed

Not E�ective

Not E�ective

Not E�ective