Apparatus, method, and program for structuring visualization object data; and apparatus, method, and program for visualizing visualization object data

A structuring apparatus for processing visualization object data, the apparatus comprising:

• a memory;
• a processor coupled to said memory, the processor comprising:
• a tree structure defining unit configured to define a tree structure of a visualization object;
• a leaf node setting unit configured to divide the visualization object data based on numerical data corresponding to a number of leaf nodes at a bottom level of the tree structure that includes the leaf nodes, into visualization object data of a plurality of local regions, and to associate the visualization object data of the local regions and information indicating positions of the local regions in the visualization object with the leaf nodes as visualization object data and node coordinate data of the leaf nodes corresponding to the local regions;
• an upper node setting unit configured to sequentially select each level of the tree structure from a level immediately above a bottom level to a top level and to sequentially select nodes included in the selected levels, configured to create visualization object data of a wide region including respective local regions corresponding to child nodes from node visualization object data associated with the respective child nodes which belong to a level immediately below a level including the selected nodes and which are nodes connected by the tree structure to the selected nodes, and configured to associate the visualization object data of the wide region and information indicating a display position of the wide region with the selected nodes as the node visualization object data and the node coordinate data;
• and
• a degree-of-importance setting unit configured to create degree-of-importance data indicating a degree of importance of the node based on the node visualization object data or the node coordinate data associated with the node for each node of the respective levels, and to associate the degree-of-importance data with the node.