What does the term 'quantitative' refer to in the context of size and value on a map?

In the context of size and value on a map, 'quantitative' specifically refers to the display of numerical data. This concept is foundational in cartography and geographic information systems because it involves representing quantities in a visually interpretable form. For instance, maps that illustrate population density, rainfall amounts, or economic statistics utilize quantitative measures to communicate information effectively.

Quantitative representation might include techniques such as graduated symbols, where the size of the symbol correlates with the value it represents, or choropleth maps, where color gradients indicate varying levels of a quantity. Therefore, when considering the relationship between size and value, it’s essential to understand that quantitative aspects inform how data is visually represented and interpreted, enabling map users to draw insights from the numerical information conveyed.