{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This visualization displays a hierarchical tree of the world’s countries, organized by continent and subregion, with each leaf node labeled by country name. Using D3 v5, the code builds the tree layout with `d3.tree()` and renders horizontal links via `d3.linkHorizontal()`, while country names appear as SVG text elements with font sizes scaling by depth. Pan and zoom interactions are enabled through `d3.zoom()`. Data is loaded from a JSON file with `d3.json()`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/67885b36621d4542a57ee6afc5d3feac?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}