I have been working with processing.js but wanted to learn a little about d3js for visualizations, so took a look at Mike Bostock's d3.js plugin for making Sankey diagrams.
So I pulled down two documents that had energy flow diagrams for Canada:
- 2006. Powerful Connections: Priorities and Directions in Energy Science and Technology in Canada. The Report of the National Advisor Panel on Sustainable Energy Science and Technology, Natural Resources Canada, p76.
- 2008. Report on Energy Supply and Demand in Canada Catalogue no. 57-003-X, Statistics Canada, p121.
If you have any (preferably Canadian) datasets that could be presented in this fashion, let me know and we can collaborate in getting them into this form.
Addendum: 2012 10 26 22:28: Wow! The Economist's blog Graphic detail: Charts, maps and infographics has an article about this post: Charting Canada's energy: Go with the flow
Related article on energy flows using Sankey diagrams: Visualizing Alberta energy flow, emissions and water use by sector