{"version":"1.0","type":"rich","title":"Melting Data with Multiple Lines","description":"This visualization displays global population trends from 1950 to 2100 as multiple colored lines, one per region, using a title, axes, and a color legend. Built with d3.v5, it uses `d3.nest` to group data, `d3.line` with `curveBasis` for smooth paths, and `scaleTime`/`scaleLinear` for axes. Data comes from UN population estimates and medium-variant projections, processed by a custom `melt` function, and rendered as SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4ed5b17f4e8a4a05a0e7c9619d2d55c5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}