{"version":"1.0","type":"rich","title":"D3 v5 Circle Packing from Observable","description":"This example visualizes a hierarchical dataset from the Observable `@observablehq/flare` library using circle packing. It displays the data as nested circles, where each circle's area encodes a value and color encodes the depth in the hierarchy. The visualization is rendered as an SVG, using D3 v5's `d3.hierarchy` and `d3.pack` layout, with a sequential magma color scale via `d3.scaleSequential`. Hovering reveals a tooltip with the full path and value, generated through SVG `title` elements.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f7f12b804bbf41d09cbf83b4229c79a3?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}