Choropleth Map
A choropleth map is a type of data visualization that uses color to represent data values across a geographic area. It is used to show the distribution of a certain variable across a region, such as population density or average income. Choropleth maps are often used to display population data, such as population density or population growth, but they can also be used to show other types of data, such as average income or unemployment rate.
History of Choropleth Maps
The first choropleth map was created in 1826 by Charles Dupin, a French cartographer. He used color to represent population density across France. Since then, choropleth maps have been used to represent a variety of data, from population density to average income. In the early 20th century, choropleth maps were used to show the distribution of racial and ethnic groups in the United States.
Comparison Table
| Variable | Population Density | Average Income | Unemployment Rate |
|---|---|---|---|
| Data Represented | Number of people per square mile | Average income per person | Percentage of people without jobs |
| Data Source | Census data | Census data | Labor force survey |
Summary
Choropleth maps are a type of data visualization that uses color to represent data values across a geographic area. They are often used to show population data, such as population density or population growth, but they can also be used to show other types of data, such as average income or unemployment rate. For more information about choropleth maps, visit websites such as the US Census Bureau, the World Bank, and the US Bureau of Labor Statistics.
See Also
- Cartogram
- Isopleth Map
- Dot Map
- Heat Map
- Flow Map
- Proportional Symbol Map
- Thematic Map
- Graduated Symbol Map
- Dasymetric Map
- Dot Density Map
