{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This interactive treemap displays the hierarchical structure of Tsinghua University, showing its schools and their constituent departments. The visualization uses a horizontal tree layout with curved links, rendered as SVG paths. It reads from a local `data.json` file, and the code uses D3 v5’s `tree`, `hierarchy`, `linkHorizontal`, and `zoom` APIs to compute the layout and enable pan/zoom functionality. Text labels adjust their font size based on depth level.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/6d8fe145d85948c19dd19543b972127f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}