how are population density figures determined?
how are different densities shown on a map?
- 1 decade agoFavorite Answer
Population density is a feature of a specific geographic region. So you count up all the people living in the region, divide by the area of the region, and that's your population density. Population density is expressed in the number of people per square mile, or people per square kilometer, depending on your preferred unit of measurement.
As an example, consider the information about Kansas on the Census QuickFacts site:
Kansas had 2,688,418 people in the year 2000, and was 81,814.88 square miles in size. Do the division, and you get their listed value for population density of 32.9 people per square mile.
On a map, the mapmaker decides how to group the densities into categories that will tell the "story" the mapmaker is interested in. Then the mapmaker selects colors or shadings (or both) to fill in each region according to the category assigned to that region. Often, the mapmaker will choose darker colors for regions with higher densities.
Of course, the "story" told by the mapmaker also depends on the regions chosen. You would get a different story looking at population density of the US if you divided the country into its 50 states than if you divided it into its around 3,000 counties. Think about that as you look at the population density maps of the world at
- Anonymous4 years ago
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