{"version":"1.0","type":"rich","title":"Melting data with multiple lines","description":"This chart shows population trends for world regions from 1950 to 2100, using a multi-line plot where each line represents a region’s population over time. It uses D3 v5’s `scaleTime`, `scaleLinear`, `scaleOrdinal` with `schemeCategory10`, `line` with `curveBasis`, and `nest` to group data. The SVG is rendered with axes from `axisBottom` and `axisLeft`, and a custom `colorLegend`. Data comes from UN estimates and medium projections, melted into a tidy format.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d538c4b74de0468d80069971e602b5d0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}