{"version":"1.0","type":"rich","title":"world map w/ cities & countries pop!","description":"A world map depicts countries with their population encoded in color opacity, alongside cities sized by population via a square-root scale. A graticule and geographic lines overlay the landmasses. The visualization uses React to render SVG marks with D3’s `geoNaturalEarth1` projection and `geoPath`, integrating country boundaries from the world-atlas TopoJSON and city data from the Simplemaps World Cities Database. Country population data from the UN Population 2019 CSV is joined onto the TopoJSON features, with no-data countries displayed uniformly.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7f69dbc23a1b473381a53ead26b5beff?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}