{"version":"1.0","type":"rich","title":"second","description":"This interactive tree visualization displays world population data organized hierarchically from continent to country to city. Using D3.js v7, it loads a CSV file with columns for Continent, Country, City, and Population, then constructs a hierarchical layout with `d3.tree()` and `d3.hierarchy()`. Nodes are colored by depth level using `d3.scaleOrdinal()`, with circles representing cities and larger nodes for parents. Hovering reveals tooltips showing city population details. The SVG renders vertical links via `d3.linkVertical()` and scales responsively through a viewBox.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/940442a433a3435aa2c5a31aedf0a0dc?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}