{"version":"1.0","type":"rich","title":"Fixed projection for US States","description":"This example displays a choropleth map of the United States, with states grouped into four color-coded regions: Northeast, Midwest, South, and West. It uses `d3.json` to load US TopoJSON data from `us-10m.v1.json`, then `topojson.feature` and `topojson.merge` to extract and combine state geometries by region. The paths are rendered as SVG elements using `d3.geoPath`, with regions filtered by state FIPS codes.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/89230eebf46e421190181786a6ec199b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}