{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization uses proportional circles to show each country’s population, with circle area scaled by the 2018 population data from a CSV file. The map renders with `d3.geoNaturalEarth1` projection and `d3.geoPath`, while a square-root scale (`d3.scaleSqrt`) determines circle radii. Users can pan and zoom via `d3.zoom`, and hovering a country reveals its name and population in a tooltip. A color legend and size legend are built with reusable D3 functions, and the map data comes from the visionscarto world atlas TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/71ad4e4375474d3b989966f09aabe49a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}