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According to various sources on the internet, treemaps are a way to visualize hierarchical, tree-like data structures, for example the tree generated by hierarchical clustering.

I looked at a lot of treemaps and I just cannot seem to understand where/how the sense of hierarchy/nestedness is conveyed. It just seems to be tiles arranged next to each other. How do I know which tile is a parent/child of which other tile(s)?

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Treemaps are not very intuitive when trying to understand hierarchy levels. Sunburn chats are better.

  • First hierarchy level is either shown by borders or different colors.
  • Subsequent hierarchy level is represented by smaller rectangle which is part of bigger rectangle.

Refer this article

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