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Answer:HOPE IT HELPS :)

Explanation: If a map was produced as immediate evidence of an area, then it is a primary source. If the map is just a symbolic depiction of a space then it is a secondary source. ... To illustrate further, the map below can be used as a primary source in a study about the development of telegraph lines between 1791 and 1872.

Maps are useful primary sources. They show details of time and the place and can help understand how things can change over time.