Scatterplot.

http://docs.enthought.com/chaco/user_manual/plot_types.html

This map is showing a relationship between median house prices and the percent of lower status in the population of a certain area. The different colors represent nitric oxide concentration, displaying green as low and red as high. This qualifies as a scatterplot due to the data showing a collection of points, each having a variable determining the position on the horizontal (lower status of population) and another on the vertical axis (median house price).