{"version":"1.0","type":"rich","title":"Learning D3.js","description":"This example shows an interactive radial dendrogram of country population data, rendered as SVG. The visualization uses `d3.cluster` to compute a circular tree layout, with leaf nodes labeled by country name and sized by text depth. Pan and zoom are implemented via `d3.zoom` on a background rectangle, transforming the containing `<g>` element. The code loads hierarchical data from `countryHierarchy.json` and projects node positions using trigonometric functions to map tree coordinates to a radial polar layout.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5446c1e407e64888aef5ffd41e22191f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}