{"version":"1.0","type":"rich","title":"Fork of World Countries Tree","description":"A collapsible tree visualization displays the hierarchical structure of world countries, organized by continent and subregion. The code uses D3 v5’s `stratify` to convert a flat CSV dataset into a hierarchy, then applies the `tree` layout and `linkHorizontal` to render curved links. Nodes are labeled with country names, with font size decreasing by depth. The SVG output supports panning and zooming via `d3.zoom`, and links and text are styled with custom CSS including a serif font and text shadows.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/290bac05f7774119aae2486c1a6fafc8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}