{"version":"1.0","type":"rich","title":"Earth Tree","description":"This example displays a hierarchical tree of Earth's continents and countries, with each node represented by a circle and label. The tree layout is computed using `d3.tree()` and `d3.hierarchy()`, which assign parent-child relationships and spatial coordinates. Nodes and links are rendered as SVG elements: circles for nodes and horizontal curved paths for links, styled via CSS classes. The data is a static JavaScript object listing continents and selected countries, and the visualization uses D3 v6 within an HTML page.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3608fe0a27334715b4f588fcf26d84d1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}