{"version":"1.0","type":"rich","title":"Points on a Map","description":"This visualization displays cities on a world map, with circle area encoding each city’s population. A natural Earth projection, rendered via `d3.geoPath`, draws land, country interiors, graticules, and a sphere backdrop in SVG. City coordinates are projected using `d3.geoNaturalEarth1`, and circle radii come from a `d3.scaleSqrt` scale. The map uses world-atlas TopoJSON data, while city populations come from a cleaned CSV of world cities sourced from the UN World Population Prospects 2019.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a60b6a01c93945f2857a874b3c3a132c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}