Isopleth maps combine features of numerical data and line contouring to create a more complete thematic expression. Often incorpirating color, isopleth maps can display a gross amount of data in a clean, contemporary fashion. Below is a perfect example, encompassing all of the above attributes to achieve its goal of displaying the Total precipitation amounts in 2007.
Found- www.dwb4.unl.edu
This blog is a map catalog in which I am displaying fifty different types of maps and a tid-bit of information that looks into the purpose of the map!