{"version":"1.0","type":"rich","title":"Choropleth Map","description":"A choropleth map visualizes population estimates per country for 2018, with each country shaded and overlaid with proportional circles sized by population magnitude. The visualization uses a natural Earth projection via `d3.geoPath` and `geoNaturalEarth1`, while `topojson.feature` loads world geometry. Population data comes from a CSV file, and a square-root scale sizes the circles. The map supports zooming through `d3.zoom`, and legends for color and size are built with custom SVG components. Hovering highlights countries and shows population in a tooltip.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c5b7112edd154fd6a19fe81109698c91?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}