Multivariate Mapping 181
Design
Considerations
When designing pie charts, the wedges start at the 12 o’clock position and keep their
same relative positions, that is, they don’t change location with changing size or impor-
tance. Of course, colors chosen for the wedges must harmonize with one another; a
wedge that is consistently small might be shown in a lighter or more intense color. The
12 o’clock position is oriented to the margins of the map; if meridians are shown or
fIgURe 9.4.
Pie charts use wedges to show different variables.
Alaska
Texas
Iowa
Indiana
Illinois
Georgia
Florida
Ohio
under
1,000,000
1,000,000-
3,000,000
3,000,0001-
5,000,000
5,000,001-
10,000,000
over
10,000,000
Percent
of Votes Cast
Democrat
votes
Republican
votes
0
25
50
75
Data Source:
U.S.
Statistical
Abstract 2009
PRESIDENTIAL ELECTION 2004
