{"version":"1.0","type":"rich","title":"Radial Tree of Countries Hierarchy","description":"This visualization presents a radial tree of countries organized by continent and subregion, with the hierarchy derived from JSON data. The layout uses `d3.cluster` to position nodes in a circular arrangement, with curved links drawn as SVG paths. Text labels display each country or region name, with font sizes scaled by depth using `d3.scaleSqrt`. Panning and zooming are implemented through `d3.zoom`, which applies transformations to the SVG group containing all elements. The design adapts Curran Kelleher’s original block, rendering all content as SVG elements within a fixed viewport.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a724d4c9f45e4513a68a8a40f1860966?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}