{"version":"1.0","type":"rich","title":"Population over Time by Region","description":"This visualization combines a line chart and a pie chart to show population changes over time by region. The line chart displays population trends from 1950 to 2100, with a vertical selector line that updates the pie chart to show the population distribution for the selected year. The pie chart uses `d3.pie()` and `d3.arc()` to render the regional proportions, while the line chart leverages `d3.line()`, `d3.curveBasis()`, and `d3.axisBottom()` for axes. Data comes from UN population estimates and medium-variant projections, processed via `d3.csv()` and `d3.timeParse()`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/295ee43f9f964f7abe7c4a8ce8374683?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}