{"version":"1.0","type":"rich","title":"Selecting a Year on a Line Chart","description":"This interactive line chart displays global population trends across regions from 1950 to 2100, with a vertical marker indicating the currently selected year. Users hover over the chart to update the marker and select a new year. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, `nest`, and `line` with `curveBasis`, rendering in SVG. Data comes from UN population estimates and medium-variant projections, processed via CSV loading and a custom melt function.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3ae870e081bb4a7d9cb65bb2a2677552?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}