{"version":"1.0","type":"rich","title":"Melting data for multiple lines","description":"This visualization shows population trends over time for the world’s regions, with each region drawn as a distinct colored line and accompanied by a color legend. The data is loaded from UN population estimates and medium variant projections, then reshaped from wide to long format using custom logic. D3 v5’s `nest`, `scaleTime`, `scaleLinear`, `scaleOrdinal`, `line`, and axis functions render the SVG line chart. Lines are ordered by their final population value, and gridlines are enhanced with tick marks.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/ff481457cd2049b0802ca3fc7a5d42dd?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}