{"version":"1.0","type":"rich","title":"Radial Tree of Countries Hierarchy - Test","description":"This example shows a radial tree layout of a hierarchical data structure, adapted from Curran Kelleher’s “World Countries Hierarchy” block. The code uses D3 v4’s `d3.cluster` and `d3.hierarchy` to compute node positions in a circle, then draws curved paths between parent and child nodes. Each node is rendered as an SVG text label, with font size scaled by depth via a `d3.scaleSqrt` transform. Panning and zooming interactions are enabled using D3’s `d3.zoom` behavior, which applies a transform to the SVG group. The data, a repeating set of object names and paths, is loaded from a local `data.json` file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/52ac76096ff34b39bd0f5019dcb81182?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}