The food industry visualizations of Michigan State University professor Phil Howard focus on relationships among businesses or sectors within the food system.
It is interesting how visualizations can carry different implicit messages even when they seem at first to address the same topic.
For example, the first of Howard's recent (December 2012) interactive visualizations of wine industry brands emphasizes the great diversity of options in the marketplace ...
... while the second of these visualizations emphasizes the comparatively heavy concentration at the corporate level.
For more about the food system more generally, see Howard's 2012 working paper with Harvey James Jr. and Mary Hendrickson. More to come on this topic of food system visualizations.