{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This visualization shows the hierarchical structure of world countries, organized by continent and subregion, as a node-link tree diagram. Built with D3 v5, it uses the `d3.tree` layout and `d3.hierarchy` to process the JSON data, while `d3.linkHorizontal` generates the curved connection paths. Text labels display each country with font sizes scaled by node depth, and the interaction model adds panning and zooming via `d3.zoom`. The SVG rendering employs the margin convention and a custom font, with subtle text shadows for readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4e1e7472ec26447d962d58bfa8e14368?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}