{"version":"1.0","type":"rich","title":"A9 Choropleth Map in D3","description":"This example displays a choropleth map of poverty rates across U.S. counties, using a sequential blue color scale to encode percentages from 0 to 100. It loads county boundaries from the TopoJSON `us-10m.v1.json` dataset and merges them with CSV data containing poverty estimates. The map is rendered as SVG paths via `d3.geoPath` with an AlbersUSA projection fit to the viewport, while `d3.scaleSequential` with `d3.interpolateBlues` determines each county’s fill color.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/18e563a76a74434c814ec2fdcc5115a0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}