Sunburst with multiple roots Part of PowerCharts XT
A Sunburst chart is really just a treemap which uses a radial layout (thus the alternative name, “Radial Treemap”). Sunbursts are a series of rings, which represent the different hierarchical levels. The innermost ring is the first level, followed by the second level which shows a breakdown of the components of the first, and so on. Like the more common rectangular treemap, the size of each sections represents the magnitude of some measure.
The nodes at the innermost ring are called as a root nodes (or parent nodes). A sunburst can have a single root node or multiple roots.