IEA Interactive Sankey Diagram
IEA Demonstrator: http://www.iea.org/Sankey/index.html
The Sankey Diagram http://en.wikipedia.org/wiki/Sankey_diagram is a particular type of a flow visualization, in which the width of the arrows are proportionally to the flow quantity. The Sankey Diagram is most often used to visualize energy related statistical data . Energy statistics on supply, trade, stocks, transformation and demand are important to gain knowledge and thus provide professional energy policy decisions.
Sankey diagrams put a visual emphasis on the major transfers or flows within a system. They are helpful in locating dominant contributions to an overall flow. Sankey Diagrams drop their arrows when energy statistics is being used. In view of the role and importance of energy in world development, energy statistics for regions and countries should be readily available and reliable, preferable as interactive visual Sankey Diagrams.
The International Energy Agency (IEA) released on September 2013 their energy statistical data in combination with interactive visualization - a research development project based on a collaboration between IEA and NComVA/NCVA. The result, an Interactive Sankey Diagram, provides more than 20 years of energy data for more than 140 countries and regions worldwide and are available as interactive data visualization that can tell a global energy story over several decades and give the user better insight and understanding: http://www.iea.org/statistics/
This interactive IEA Sankey Diagram help users visualising energy transfers for the world, specific regions (All OECD countries, African or European countries )and individual countries. Each element of energy production or consumption is represented by an arrow that widens or narrows based on the amount of energy it represents. The Sankey Diagram can be interactively time animated to show year-to-year changes dating back as far as 1973 (see animation bar below).
And I would like to emphasize that the Sankey flows have been a real hit. In many events and meetings where we have demonstrated the charts, you can tell that people find it very fascinating. So I want to thank you for your contributions to not only for the Sankey flows, but in the field of your research as well. I do think that an essential part of collecting data is to really think how it will be disseminated to the people not necessarily very familiar with the topic.
Figure: Interactive features provided in the IEA Sankey Diagram
The figure below is a snapshot from the iteractive IEA Sankey Diagram showing total energy consumption (2011) is represented by arrows that widens or narrows based on the amount of energy consumption the arrow represents. The Sankey Diagram supports many interactive features (see above) including an interactive time animation that visualizes year-to-year changes enlightening the user.
Figure: Interactive IEA Sankey Diagram available at: http://www.iea.org/Sankey/index.html
One of the most famous Sankey diagrams, created already in 1869 is the Charles Minard's Map of Napoleon's Russian Campaign of 1812. A flow map overlaying a Sankey diagram onto a geographical map: http://en.wikipedia.org/wiki/File:Minard.png
Last updated: 2015-03-25