{"version":"1.0","type":"rich","title":"Fork of World Countries Tree-exercise","description":"This example shows a hierarchical tree visualization of world countries, organized by continent and subregion as a branching structure. The graph renders country names as text labels with size decreasing by depth, connected by curved links. Built with D3 v5, it uses `d3.hierarchy`, `d3.tree`, and `d3.linkHorizontal` to compute and draw the layout, with `d3.zoom` enabling pan and zoom on the SVG. Data comes from a local `data.json` file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/11d5e1a04d7d4d5f8aff590d93b9b6fb?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}