Volume of posts by date in the Bluelight forum
Clara Bacciu kleem
A comparison of two forums analysed in the Cassandra project (Bluelight on the left, and Drugsforum on the right). Two hierarchies are visualized in a single treemap having a "fake" root (and two "fake children" used to create a padding between the two hierarchies).
Another tremap whose data comes from a forum analysed in the Cassandra project. This example is similar to a previous one, but uses a cavalier projection instead of isometric.
(Edit: found a similar approach named Cascaded Treemaps)
An isometric treemap using tree colors to help in differentiating subtrees and perceiving hierarchy depth. Since leaves can be attached also to nodes that are not at the end of the hierarchy, a flat space is used to represent those leaves. The hierarchy is the structure of a forum analysed in the Cassandra project.
Radial tree depicting the structure of a forum analysed in the Cassandra project. The area of each node depends from the number of posts contained in the respective section of the forum. It is not truly proportional, since nodes having no posts have an area that is greater than 0 in order to make them visible. The layout comes from this example.