An isopleth map possesses isolines which are lines connected by points with the same numerical value or ratio of something, whether its geographical or meteorological phenomena. This isopleth map shows the density of H1N1 deaths in California in 2009. As you can see the more deaths are portrayed by the darker colors, and as the lines branch out from the areas of more deaths, it gets lighter, representing less deaths. This just shows that the more populated areas had more deaths than the less populated area, but that is pretty self explanatory because more people come in contact with one another when there is a larger population density, so there is a higher density of deaths.
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