Unclassed choropleth maps

Unclassed choropleth maps use shading just like classed choropleth maps but, instead of having a range for each color, an unclassed map will have a number that is equal to a certain shade of black and white.  Then the following ones are all adjusted around the number closest to it. So this would be the example on the right.This is why these maps are trouble, because if you were to have the same map in classified then it would look different. http://krygier.owu.edu/krygier_html/geog_353/geog_353_lo/geog_353_lo07.html