Maps of science help us visualize and conceptualize how different scientific disciplines relate to each other. Although many maps assume a hierarchy of disciplines, Richard Klavans and Kevin Boyack believe the structure should be circular.
Klavans, Richard and Boyack, Kevin W.
"Mapping unknown regions,"
Research Trends: Vol. 1
, Article 10.
Available at: https://www.researchtrends.com/researchtrends/vol1/iss8/10