{"version":"1.0","type":"rich","title":"Radial Tree of Countries Hierarchy","description":"This radial tree shows the hierarchical structure of countries grouped by continent and subregion, with the root node \"World\" at the center. It renders a clustered dendrogram using D3 v4’s `d3.cluster` layout, drawing curved SVG paths for links and text labels for each node. The visualization supports zooming and panning via `d3.zoom`, and adjusts label size and rotation based on depth and angle. Data is loaded from a JSON file representing the geographic hierarchy.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9769441ab8a04b559d7442074ad8d191?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}