This reading gives further insight on the categorization of graphs and their purpose. Diagrams allow us to see relationships that would not come forward in a straight list of numbers or a verbal description. Information Grahics have the power to inform and impress.
According to Lupton, there are three kinds of networks. Centralized networks share a common point. A decentralized network has a spine with radiating elements. A distributed network is peppered with nodes of connectivity. All networks can be described graphically with points and lines.