{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A hierarchical tree visualization displays the world’s countries, grouped first by continent and then by subregion, using a left-to-right layout. The D3 v5 code loads a JSON file and applies the `tree` and `hierarchy` layouts to position nodes, while `linkHorizontal` generates the connecting paths. Text labels, with font sizes decreasing by depth, are drawn for every node, and a zoom interaction via `d3.zoom` allows users to pan and scale the SVG graphic.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4dc9567bff63498aaf8945153d86bf71?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}