What is a similarity between different types of thematic maps, such as choropleth maps or proportional symbol maps?

Question

What is a similarity between different types of thematic maps, such as choropleth maps or proportional symbol maps?

1) Thematic maps all show political boundaries, although they might display boundaries at different scales.
2) Thematic maps show connections between different political or physical locations.
3) Thematic maps all show physical feature or natural processes.
4) Thematic maps show additional information associated with particular political or physical locations.

Answer 1

4) Thematic maps show additional information associated with particular political or physical locations.

Answer 2

The similarity between different types of thematic maps, such as choropleth maps or proportional symbol maps, is that they all show additional information associated with particular political or physical locations. This means that regardless of the specific type of thematic map, they are all designed to display data that is relevant to specific locations.