#46 Triangular Plot

>Source: http://ex-parrot.com/~chris/images/20050407/triangle.png

A triangle plot is a graph of 3 variables. The proportions of the three variables within the triangle plot add up to a constant. This particular plot shows how the eligible voters of the UK tend to vote in an election. The white circle indicates the results of an pre-elction poll.

#4 Thematic maps

Thematic maps are ones that display a spatial distribution of an attribute of a single element. Usually, a thematic map displays a single attribute such as soil type, vegetation, geology, land use, or landownership. This particular one focuses on soil of the United States.

>Source: http://soils.usda.gov/use/thematic/images/drought_1_gen_area_map.jpg