{"version":"1.0","type":"rich","title":"Points on a Map","description":"This example displays a stylized world map with semi-transparent, scaled circles marking the population of cities. The visualization uses a Natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath` to render land masses, graticules, and country interiors from a TopoJSON world atlas. City coordinates are projected onto the SVG canvas, with circle radii determined by a square root scale (`d3.scaleSqrt`) based on population data loaded from a CSV. The React application manages data fetching with custom hooks, while the `Marks` component renders the geographic layers and city points.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a77f3c0a79d14968862ce8042b9d305f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}