A hierarchical organizational chart is depicted as a radial tidy tree, with the top node at the center and departments and roles radiating outward based on their depth level. The visualization uses a D3.js v4 framework, rendering to an SVG canvas. The code calls `d3.cluster()` and `d3.hierarchy()` to compute the layout, and `d3.zoom()` for interactive pan and zoom. Text labels for leaf nodes are rotated to follow the radial direction, while intermediate and root labels remain horizontal. The data is loaded from a local `data.json` file.