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Resources for the modern journalist. From Loose Wire

TreeMap tools

treemap screenshot

Treemap Guide from ManyEyes: A tree map is a visualization of hierarchical structures. It is very effective in showing attributes of leaf nodes using size and color coding. Tree maps enable users to compare nodes and sub-trees even at varying depth in the tree, and help them spot patterns and exceptions.

To make a simple Treemap, create three columns. The first is the topic or category, and then the sub-topic or actual elements. Then the value in the final column determines the size of the square itself:


Will become when pasted into ManyEyes:


Alternatively, there’s a gadget for Google Docs spreadsheets which slots straight into your spreadsheet:


Here are some more links to explore:

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