{"version":"1.0","type":"rich","title":"Let's make a map with D3.js!","description":"This example shows a basic choropleth map of U.S. counties, rendered as solid maroon SVG paths with thin black borders. The visualization uses D3 v5’s `geoPath` and `geoMercator` to project TopoJSON county boundaries loaded from a FreeCodeCamp-hosted dataset. The map displays all counties at once without any interactivity or data-encoding choropleth coloring, serving primarily as a technical demonstration of projecting and drawing geographic features with D3 and TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a00241a378914cecb6db9f8216f90151?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}