{"version":"1.0","type":"rich","title":"Circles on a map","description":"A world map rendered in SVG displays projected population estimates for 2050 as semi-transparent black circles sized by value and positioned at each country’s centroid. The visualization uses `d3.geoNaturalEarth1` and `d3.geoPath` to draw the map, `d3.scaleSqrt` for proportional circle radii, and `d3.zoom` for panning and zooming. Animated circle transitions appear sequentially, while a static legend from `colorLegend.js` lists population values. Data comes from a CSV joined to TopoJSON country geometries.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/54632dcc460549bf8230e9a3feb2c338?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}