{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A hierarchical tree visualization displays the countries of the world organized by region, using a horizontal node-link layout rendered as SVG. The code builds the tree with D3's `d3.hierarchy` and `d3.tree` functions, then draws curved links via `d3.linkHorizontal` and positions text labels from the nested data structure in `data.json`. Interactive pan and zoom are enabled through D3's zoom behavior, while the `Playfair Display` font and green link strokes style the final presentation.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/dfcc283dcef94ee58d8ee7099eaa334c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}