What is the difference between a isoline map and dot map? Also are they reference or communication maps?

The answer is below

Explanation:

Isoline map is a form of map that uses lines on the map to depict the connection between the geography of a given area and the related data obtained from the area.

On the other hand, Dot map is a form of map that uses points or dots to show what is on the map, specifically representing larger data of geographic distribution, with each dot having a value.

Also, there is a reference map: this type of map depicts particular features of an area. For example, zip code map, geologic map, topography map, etc.

The communication map however is not related to geography, but rather depicts the expected flow or channel of communication. It also shows the method of communication.