Packed Circle Chart
Also called: Circle packing, Packed Circle Diagram
Circle Packing is a method to visualize large amounts of hierarchically structured data. Tangent circles represent brother nodes at the same level; to visualize the hierarchy, all children of a node are packed into that node (and thus determine its size). The size of a leaf-node can represent an arbitrary property, such as file size. An advantage of this algorithm is the good overview of large data sets and the clear representation of groupings and structural relationships.