{"version":"1.0","type":"rich","title":"Fork of Selecting a Year on a Line Chart","description":"This interactive line chart displays United Nations population projections from 1950 to 2100, with each line representing a world region. Users can hover over the chart to select a year, triggering a vertical marker that updates the display. The visualization uses d3.line with curveBasis, d3.nest for data grouping, and d3.scaleOrdinal with schemeCategory10 for color encoding. A custom d3.scaleTime handles the year axis, while event listeners on a transparent rectangle detect mouse movement to update the selected year and re-render the SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/121d85e98d4340b6a6cda175cd2a7ef2?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}