{"version":"1.0","type":"rich","title":"Chloropleth in class","description":"This example shows a pair of choropleth maps of the world using a linear blue-to-red color scale to encode each country's birth rate, with missing data rendered in grey. The maps are drawn side-by-side as two SVG elements, each using `d3.geoEqualEarth` projection and `d3.geoPath` to render GeoJSON features. Data comes from a CSV of world statistics loaded with `d3.csv`, and country geometries from a GeoJSON URL via `d3.json`. The code uses React and D3 v6, with a `Map` for lookups and `d3.scaleLinear` for color mapping.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/29235aaee2184a5e9482cba78055c2a7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}