Choropleth maps are thematic maps that show areal data by showing different colors. They are usually divided by things such as countries, states, or census tracts. Most are areally averaged by percentages or densities. In this map of Africa, life expectancy is measured in each country. It is divided by country because it makes it easier to compare them to one another. This map shows that no countries in Africa have a life expectancy that exceeds 73 years. Many of the developing countries have lower life expectancy and this map shows an easy way to compare them.
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