{"version":"1.0","type":"rich","title":"D3 World Countries Tree","description":"This visualization displays the hierarchical structure of world countries organized by continent and subregion, using a collapsible tree layout rendered as SVG. The code employs D3 v5’s `tree` layout and `linkHorizontal` generator to draw curved links, with `hierarchy` parsing the nested `data.json` file. Text labels scale in font size based on depth, and a zoom behavior allows panning and scaling via `d3.zoom`. The tree reads from a static JSON dataset and applies Playfair Display typography for readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/704a4124da9945789014b8a43657c393?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}