Chloropleth Map

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

Above is an illustration of a thematic map, which is used to show measurements of the statistical variable being displayed on the map.  Different color patterns allow us to easily visualize how a measurement varies across a geographic area, which in this case is the United States, or it shows the level of variability within a region.  The more difference between the colors then the higher the difference between their numerical value and the above picture shows the one year forecast for changes in jobs.