This radial tree visualization displays the hierarchy of Nigeria’s administrative divisions, from geographic zones down to local government areas. Built with D3 v4, it uses the `d3.cluster` layout to arrange nodes in a circular pattern, with SVG paths drawn as curved links between parent and child nodes. The visualization supports panning and zooming through `d3.zoom`. Text labels scale in size based on depth, and leaf nodes are rotated outward for readability. Data is loaded from a local `data.json` file containing the nested structure of regions, states, and LGAs.