{"version":"1.0","type":"rich","title":"Sized Points on a Map","description":"A world map displays cities with populations over 50,000 as sized points, using a square-root scale to map population to circle radius up to 15 pixels. The visualization is rendered as SVG via React, with geographic features drawn using `d3.geoPath` and a Natural Earth projection from `d3.geoNaturalEarth1`. Country boundaries and graticules come from the World Atlas TopoJSON, while city coordinates and populations load from a Simplemaps CSV. The map uses `d3.scaleSqrt` for point sizing and an opacity of 0.3 for the city circles.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4ef7bf53c61b4c70859bb62d339c9bfd?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}