Bivariate Choropleth Map

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The above map example is one that is known as a bivariate choropleth map because it takes into account two different variables when it presents data in its range of averages. In this map, the actual choropleth map has data that is given about different countries in Africa and how these countries compare to each other in both life expectancy and gross national product. Bivariate choropleth maps are always really interesting due to the fact that they have two different data sets and variables, therefore they are able to help show relationships better. In this case, it helps to see how an increase in money in a country really does improve a persons life because although there are a good amount for black countries, high GNP and high life expectancy, there is only one country that has a very low GNP and still high life expectancy, most low GNP countries have the corresponding low life expectancy.