Venn Diagram

History of Venn Diagram These charts were first mentioned in the 1880 paper entitled “On the Diagrammatic and Mechanical Representation of Propositions and Reasonings” in the Philosophical Magazine and Journal of Science. But the roots of these types of charts go back much further, at least 600 years. In the 1200s, philosopher and logician Ramon […]

Sankey Diagram

Sankey diagrams are a type of flow diagram which is used to represent energy inputs, useful output, material flows, cost breakdowns and wasted output, etc. The entities being connected are called nodes and the connections are called links in which the width of the arrows/links is proportional to the flow rate and are used to […]

Network Diagram

Network Graph visualizations show how things are interconnected through the use of nodes/vertices and link lines to represent their connections. They illuminate the type of relationships between a group of entities through circles drawn as nodes joined by simple lines to represent links between nodes. Also popular as Network Graph, Network Map, Node-Link Diagram, these […]

Geographic Network Diagram

Geographically-situated networks, in which nodes are placed in space at their actual geographic locations, offer an incredibly rich new analytic framework that blends spatial and non-spatial connectivity in a single visual.  A graph is the mathematical abstraction of a network. It consists of vertices and edges connecting those vertices. A geographic graph is a graph […]

Gantt Chart

A Gantt chart visualization shows activities (tasks or events) displayed against time, most commonly used for the purpose of project management and scheduling. On one axis is a list of the activities and along the other is a suitable time scale. Each activity is represented by a bar; where the position and length of the […]

Chord Diagram

A chord diagram is a graphical method of displaying inter-relationships between data radially around a circle. It represents flows or connections between several entities (called nodes) with the relationships between the nodes typically drawn as arcs connecting the data. Here the size of the arc is proportional to the importance of the flow. Chord diagrams […]