An important consideration in producing a choropleth map is the choice of classification scheme to be used. |
Because these objectives often conflict, a choropleth map that is best for one objective may not be best for others. |
On a choropleth map, cartographic convention assigns the darkest color to the highest value. |
They also compared a choropleth map showing the number of people living in each state with one showing population density. |
If you have numerical data that links to geographic regions, this type of thematic map, also known as a choropleth map will help you understand and compare your values by displaying color ranges. |
A choropleth map of the area might show that there was a cluster of cholera cases, but it might not, depending on where the boundaries are drawn. |