{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This visualization shows the hierarchical structure of world countries organized by continent and subregion. It uses a horizontal tree layout with D3.js v5, rendering SVG elements for both links and text labels. The code applies D3's `tree()`, `hierarchy()`, `linkHorizontal()`, and `zoom()` APIs to construct the layout and enable interactive panning and zooming. The underlying data comes from a JSON file containing nested country and region names.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/08c5e6cb43724da8a1c1386e161dae17?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}