{"version":"1.0","type":"rich","title":"Fork of Visualization of Spatial Data - Tree Graph","description":"This interactive tree diagram visualizes hierarchical EV data by country, vehicle type, and parameter, with collapsible nodes that let users explore nested branches. Built with D3.js v6, the visualization uses `d3.hierarchy` and `d3.tree` to compute node positions, renders nodes as SVG circles with text labels, and draws curved links via path elements. Clicking a node triggers a smooth animated transition that expands or collapses its children, while branches beyond the second level start collapsed to reduce clutter. All rendering is SVG-based with CSS styling applied to node fills and cursor states.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/63d482e9197844cb80e8c9be88b9c820?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}