{"version":"1.0","type":"rich","title":"A9 - Choropleth","description":"This choropleth maps 2021 poverty rates by U.S. county, coloring each county on a blue sequential scale where rates are multiplied by five for stronger visual contrast. The visualization loads county and state geometries from the us-atlas TopoJSON file, then joins them with USDA Economic Research Service poverty estimates via FIPS codes. It renders using d3.geoPath inside an SVG, with state boundaries drawn as white meshes and county tooltips showing the county name, state, and exact poverty percentage. The code uses d3.json and d3.csv for data loading, along with d3.scaleSequential and d3.interpolateBlues for color encoding.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/891242ed2dd1440093d8eb1070872bbf?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}