{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This interactive visualization displays the hierarchical organization of world countries, grouped by continent and subregion, using a tree layout that branches from a central root. The code constructs the tree structure from JSON data with `d3.hierarchy` and positions nodes using `d3.tree`, rendering curved vertical links with `d3.linkVertical` and labels as SVG text elements. Each country appears as a labeled point, with the tree expanding downward to reveal the nested geographic groupings.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7d114664ac35452a8aa4cc4cc8d3c8a2?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}