{"version":"1.0","type":"rich","title":"Basic D3 map (live mods) d3v4","description":"This example shows a world map rendered with a stereographic projection, overlaid with populated places as scaled circles. The map uses D3 v4’s `d3.geoStereographic` projection and `d3.geoPath` to draw country outlines from GeoJSON world data. City points come from a second GeoJSON dataset, with circle radius proportional to `pop_max` and color indicating megacity status (dark green) versus other populated places (salmon). The code loads both datasets via `d3.json` and appends SVG circles with opacity for visual clarity.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-b706d6756249810b7926e3a67140e624?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}