Standardized choropleth maps

http://courses.washington.edu/info424/Labs/ChoroplethMap.html

Like all choropleth maps, the standardized choropleth map uses colors and shading in order to display the variables it explaining in a geographical area. The standardized choropleth is specialized in the sense that it uses a method to standardize it's data. This can be accomplished using standard deviation—the distance that data points are from the mean of the data. This aids in creating ranges for the colors that represent data to be used. This map uses ordered breaks between percents to split up the ranges and shows the forecast change in jobs in the United States a year from 2009 to 2010. Places like Alabama would see a comparatively large loss in jobs while New Mexico would actually see an increase in them.