{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example displays two choropleth-style encoded variables on a world map. Country polygons are colored green or red based on a 2019 property, while circles sized with a square-root scale represent 2018 population data projected at each country’s centroid. The visualization uses D3 v5’s `geoNaturalEarth1` projection, `geoPath`, and `geoCentroid` to render SVG paths and circles, with TopoJSON from the visionscarto-world-atlas source. A zoom behavior from D3 enables interactive panning and scaling of the entire map group.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/6e724380ef09441795e8ce54284c7a11?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}