Sankey diagram

[4] One of the most famous Sankey diagrams is Charles Minard's Map of Napoleon's Russian Campaign of 1812.

Minard had used this form of diagram for visualising flow of goods and transport of people from at least since 1844.

[8] Eurostat, the Statistical Office of the European Union, has developed an interactive Sankey web tool to visualise energy data by means of flow diagrams.

[9] The tool allows the building and customisation of diagrams by playing with different options (country, year, fuel, level of detail).

[10] Users can select specific countries, points of time back to 1973, and modify the arrangement of various flows within the Sankey diagram.

Example of a Sankey diagram
Sankey's original 1898 diagram showing energy efficiency of a steam engine
Minard's diagram of Napoleon 's invasion of Russia , using the feature now named after Sankey
Earth's energy budget – line thickness is linearly proportional to relative amount of energy
Balance of trade with the United States (2023)