{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This hierarchical tree visualization displays the world’s countries grouped by continent and subregion, using D3’s `d3.tree` layout and `d3.hierarchy` to structure the data. Each node label is rendered as SVG text with font size decreasing by depth, while curved links are drawn using `d3.linkHorizontal`. The chart supports pan and zoom through D3’s `zoom` behavior. Data is loaded from a JSON file, and styling relies on the Playfair Display font.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c8a13d73932641deaa6c1dd98e055eb4?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}