{"version":"1.0","type":"rich","title":"Radial Tree of Countries Hierarchy Example","description":"A radial tree visualization displays the hierarchy of world countries organized by continent and subregion. Built with D3 v4, it uses the `d3.cluster` layout and custom projection functions to position nodes in a circular arrangement. The visualization supports panning and zooming via `d3.zoom`, with interactive transforms applied to the SVG group. Node labels vary in font size based on depth, and curved paths connect parent-child relationships. The data comes from a local JSON file structured around geographic regions.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5c9f409c9005441e8fce184646886729?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}