Question

Which variables are used to prepare Choropleth maps?
A) Geographical variables
B) Distribution variables
C) Statistical variables
D) None of these

Answer 1

Hint: A map is a symbolic representation of a space that emphasizes relationships between objects, regions, or themes. Many maps are static, meaning they are fixed to paper or another durable medium, whereas others are dynamic and interactive.

Complete answer:
Choropleth maps are popular thematic maps that represent statistical data on predetermined geographic areas using various shading patterns or symbols (i.e. countries). They have a knack for using data to represent variability in a desired measurement across a region.

Choropleth maps are a simple way to see how a variable changes over time or to show the level of variability within a region. A heat map or isarithmic map is similar to a choropleth map, but instead of a priori geographic areas, it uses regions drawn according to the pattern of the variable.

Because published statistical data (from government or other sources) is generally aggregated into well-known geographic units, such as countries, states, provinces, and counties, the Choropleth is likely the most common type of thematic map. They are thus relatively easy to create using GIS, spreadsheets, or other software tools.

So, The data for various geographical variables is represented in these maps by shades or tints of various colors. The data for different variables is obtained through various processes when creating such maps.

Thus, the correct answer is option ‘A’ i.e, Geographical variables.

Note: Advantage of maps:
- Maps are more convenient to use and transport.
- They can depict the entire earth's surface or just a portion of it, and they can even represent a tiny area in amazing detail.
In the data window, expand a dataset to reveal its fields. Choose a field for a rate or ratio. If you have rate/ratio values in a number field, it's a good idea to put them in a number field. Drag the field to the map drop zone and onto the page. Counts and quantities (Color) as the Symbol type setting will be used to build a choropleth map.