# What is a choropleth map used for?

## What is a choropleth map used for?

Choropleth maps use the Counts and amounts (Color) smart mapping symbol type to show normalized data as shaded points, lines, or areas. Choropleth maps help answer questions about your data, such as: How do rates or percentages compare by geographic feature?

What does a Choropleth graph show?

A choropleth map displays divided geographical areas or regions that are coloured in relation to a numeric variable. It allows to study how a variable evolutes along a territory. It is a powerful and widely used data visualization technique.

What should a choropleth map include?

Choropleth Maps display divided geographical areas or regions that are coloured, shaded or patterned in relation to a data variable. This provides a way to visualise values over a geographical area, which can show variation or patterns across the displayed location.

### What are the disadvantages of a choropleth map?

• They give a false impression of abrupt change at the boundaries of shaded units.
• Choropleths are often not suitable for showing total values.
• It can be difficult to distinguish between different shades.

What is a choropleth map simple definition?

Definitions of choropleth map. a map that uses graded differences in shading or color or the placing of symbols inside defined areas on the map in order to indicate the average values of some property or quantity in those areas.

What does a choropleth map look like?

3.1: Choropleth Maps. A choropleth map is a map where colored or shaded areas represent the magnitude of an attribute. The states with a lower population density are shaded with a lighter gray color. The states of a higher population density are shaded with a dark gray color.

#### How do you read a Choropleth?

First read the instructions and colour legend/key to understand what the shading means. Look for the regions with the largest value shades, then look for the lighter colours to see the low values. Look out for any significant regional patterns – maybe neighbouring areas are a similar shade or are very different.

Although choropleths give a good visual impression of change over space there are certain disadvantages to using them:

• They give a false impression of abrupt change at the boundaries of shaded units.
• Choropleths are often not suitable for showing total values.
• It can be difficult to distinguish between different shades.

What is choropleth in Python?

A Choropleth Map is a map composed of colored polygons. It is used to represent spatial variations of a quantity. This page documents how to build outline choropleth maps, but you can also build choropleth tile maps using our Mapbox trace types.

## How can a choropleth map be improved?

Make sure there is a lightness difference in your sequential/diverging color schemes. A gradient from a light color to a dark color enables your readers to quickly spot the regions with low and high values. Using different colors can increase the contrast, but shouldn’t be overdone.