{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A hierarchical tree visualization displays the world's countries organized by continent and subregion, with each country as a leaf node. The layout uses d3.tree() and d3.hierarchy() to structure the JSON data, while d3.linkHorizontal() generates the curved link paths. Text labels align dynamically based on whether a node has children. Pan and zoom functionality is implemented via d3.zoom(), and margins are applied using the standard D3 margin convention. Custom fonts and text shadows enhance readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/548d2fe2dcbd406fb16040595da69c3e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}