{"version":"1.0","type":"rich","title":"World Countries Tree","description":"A radial tree layout displays the hierarchical structure of a traffic sign information system, rendering nodes as circles and links as curved paths using `d3.linkRadial`. Node labels position radially with `d3.pointRadial`, and font size decreases with depth. The visualization supports zooming and panning via `d3.zoom`, with data loaded from a local JSON file and drawn as SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f0cd68bf7bed46788b1889f709b5c510?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}