{"version":"1.0","type":"rich","title":" World Countries Tree","description":"A tree diagram visualizes the hierarchical structure of world countries, organized by continent and subregion, with the root labeled \"Earth.\" The layout uses a horizontal tree, with nodes as text labels and red links connecting parent and child nodes. The visualization is built with D3.js v5, using `d3.tree`, `d3.hierarchy`, and `d3.linkHorizontal` to compute and draw the structure from a JSON file, while `d3.zoom` enables panning and zooming. Node text sizes decrease with depth, and the Playfair Display font is applied to labels.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/66858b195ac8473886cf5cb3d64db638?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}