{"version":"1.0","type":"rich","title":"Tree graph","description":"This tree visualization displays COVID-19 statistics by region, from the global root down to individual countries and their cumulative confirmed cases, deaths, and recoveries. The example uses D3 v7’s `d3.tree()` layout and `d3.hierarchy()` to position nodes in a hierarchical structure within an SVG. Leaf nodes carry named values such as “Cumulative Confirmed Cases - 150000,” while branch nodes group continents and countries. The code assigns data-driven properties like `type` and `level` to each node, though the visible rendering draws nodes as white circles with steelblue strokes and gray linking paths.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1987789b9bd149c68ace7337fd1241ef?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}