{"version":"1.0","type":"rich","title":"World Countries Tree","description":"This example visualizes the hierarchical structure of world countries, grouped by continent and region, as a horizontal tree diagram. It uses a D3 tree layout with `d3.hierarchy` and `d3.linkHorizontal` to draw curved links, while node labels are rendered as SVG text elements with font sizes scaled by depth. The visualization supports pan and zoom interaction through `d3.zoom`, and data is loaded from a JSON file. Styling is applied via CSS, with teal link strokes and white text shadows for readability.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7871df465e6e4a80bb2047f7f9da56ad?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}