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It's an attempt at visualizing various stances on a subject, which can be almost anything; from simple comparisons such as "Masala or Vindaloo" to questions such as "Should agencies launch their own products?" It's based on informal logic; you can read more about the concept behind the project in the authors' blog post.
In practice, it's a neat interactive visualization, with the argument being in the centre, and the discussion stemming around it. You can see an example of how it works below, and you can also create your own maps with a very simple tool over at the official site.