{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This example visualizes the hierarchical structure of world countries, organized by continent and subregion, using a tree layout. The code applies `d3.tree` and `d3.hierarchy` to a nested JSON dataset, rendering links with `d3.linkHorizontal` and text labels for each node as SVG. Pan and zoom interactions are enabled via `d3.zoom`, while node font sizes decrease with depth. The visualization uses a Playfair Display font and a white text shadow for readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/972a227e1e43430c915f40059411933e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}