{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This visualization shows the hierarchical structure of world countries organized by continent and subregion, with each country labeled as a leaf node in a tidy tree layout. The tree radiates horizontally from a root node, with font sizes decreasing at deeper levels and country names displayed after their parent regions. Using D3 v5, the implementation applies `d3.tree()` and `d3.hierarchy()` to compute node positions, `d3.linkHorizontal()` to generate curved link paths, and SVG rendering with pan-and-zoom support via `d3.zoom()`. The data comes from a pre-structured JSON file, and text elements include a glow effect via CSS `text-shadow` for readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/20f25b2353924968bdceb5cc48c4bd91?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}