ANGULAR TREEMAPS - Information Visualisation: Techniques, Usability and Evaluation - page 93

Extended Angular Treemaps
The advantage of the algorithm is the ability to extend it to various
enclosed display containers. This allows the combining of Angular
Treemaps with any other visualization method adopted into a wider range
of domains and applications. Examples for extended angular treemaps are
presented in different containers, such as triangle, pentagon and hexagon
(see Fig. 5.5 and 5.6). Fig. 5.5 illustrates Angular Treemaps layout of 272
nodes within a triangle. It applies different rotated angles in four divided
segments. Fig. 5.6 shows the visualization result of a data set with 16,000
nodes using Angular Treemaps with 90 degrees on a pentagon. Fig. 5.7
presents the visualization of a very large data set with over 81,000 nodes,
generated by this technique with 45 degrees and 15 degrees on a hexagon
container. Angular Treemaps are able to offer flexibility of container and
containment. Fig. 5.8 is a visualization result of a data set with 16,000
nodes. The container is a convex octagonal shape and uses an angular
polygonal algorithm embedded within the vertical-horizontal partition.
Fig. 5.5. Triangular container illustration: visualization of a data set which has 272
nodes with two sub-hierarchies rotated by different angles.