{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization displays global population by country using proportional circles overlaid on a geographic map, with circle area scaled to 2018 population data. Users can pan and zoom the SVG scene, and hovering over a country reveals its exact population via a tooltip. The code combines d3.geoNaturalEarth1 and d3.geoPath for map rendering, d3.scaleSqrt for circle sizing, and d3.zoom for interaction, while loading TopoJSON world boundaries and UN population data. A separate size legend and color legend communicate the visual encoding.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/412040f048694106bc7f8e5e65f045aa?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}