Classed choropleth map

http://www.google.com.pe/imgres?imgurl=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4GxI4MUkZmOMpkWZU2AI8Udnl-_M9T_8OyvnUGB1Z6fzVOnDTbD5PQYBWXxKrhU8J6XrwSpei0G2CssXVEBePs9bALr1PK63nqLax1sWFOjqDanV-vqPxJ09fs02gFr2ZvP_9kcKw8Fk/s320/32-+Classed+choropleth+maps.png&imgrefurl=http://tomsmapcatalog.blogspot.com/2010_04_01_archive.html&usg=__oRCP0fBiuJR2O19NSnPO1gV_eLY=&h=193&w=280&sz=29&hl=es&start=20&zoom=1&um=1&itbs=1&tbnid=-YHYtTWD_LXpAM:&tbnh=79&tbnw=114&prev=/images%3Fq%3DClassed%2Bchoropleth%2Bmaps%26um%3D1%26hl%3Des%26ndsp%3D20%26tbs%3Disch:1
A choropleth map is very easy to read, the colors are proportional to what is being measured in the legend. This map in specific measures the victories for either George Bush or John Kerry during the 2004 presidential elections.