{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A hierarchical tree visualization displays the world’s countries grouped by continent and subregion, with each node labeled by name. The layout uses D3’s `d3.tree` and `d3.hierarchy` to position nodes, while `d3.linkHorizontal` generates curved connecting paths. Text size decreases with depth, and labels are anchored differently for parent versus child nodes. The SVG rendering supports interactive pan and zoom via D3’s `d3.zoom`, with styling provided by an external stylesheet using the Playfair Display font.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ef9d63554202474c8ea71588b8efa33e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}