{"version":"1.0","type":"rich","title":"World Countries","description":"This example presents the hierarchical structure of world countries as an interactive zoomable tree diagram. The visualization organizes countries by continent and subregion, revealing geographic groupings at a glance. Using D3.js v5, the code loads data from a JSON file and applies the `d3.tree()` layout with `d3.hierarchy()`, rendering horizontal links via `d3.linkHorizontal()`. Pan and zoom functionality is implemented with the `d3.zoom()` behavior, while text labels display country names with size scaling by depth. The SVG-based rendering allows smooth exploration of the global hierarchy.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0133f0fbe3644cd0b199307cd8ad0107?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}