A sunburst is similar to the treemap, except it uses a radial layout. The root node of the tree is at the center, with leaves on the circumference. The area (or angle, depending on implementation) of each arc corresponds to its value. Sunburst design by John Stasko.
This example uses color to encode different packages of Schema.org 's schema. Gist based on @mbostock 's Gist #4063423
Data from Schema.org.