{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization shows world population by country using proportional circles on a natural Earth projection map, with circle area corresponding to 2018 population data from a UN dataset. Users can pan and zoom, while hovering reveals a country’s name and population. The code uses `d3.geoPath` with `topojson` for map features, `d3.scaleSqrt` for circle sizing, and `d3.zoom` for interaction. A size legend displays tick marks, and a color legend is also implemented, with SVG rendering throughout.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/35de8620ee8242d7a3ef732a156403d9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}