{"version":"1.0","type":"rich","title":"Fork of Radial Tree of Countries Hierarchy","description":"A radial tree diagram visualizes the hierarchy of world countries, grouped first by continent and then by subregion. The visualization uses a D3 v4 cluster layout, with SVG paths depicting connecting links and text labels for each country. The code employs `d3.hierarchy`, `d3.cluster`, and `d3.zoom` to enable panning and zooming of the entire diagram. Data is loaded from a local `data.json` file and rendered with a linear gradient of font sizes based on depth in the hierarchy.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e1dd17b012c64b2495c8dfc69c08016b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}