{"version":"1.0","type":"rich","title":"Circle on the Map","description":"This interactive map visualizes projected population changes from 2020 through 2030, with circles sized by population using a square-root scale. The visualization animates growth by iterating through years, transitioning circle radii with `transition.delay` and `transition.duration`. It uses D3 v5 with `geoNaturalEarth1` projection, `geoPath`, and TopoJSON world data merged with UN population CSV data, offering zoom via `d3.zoom` and a legend showing population values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/907897af76014e0f9852ba9431e20e67?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}