{"version":"1.0","type":"rich","title":"A9 Choropleth","description":"This choropleth visualizes U.S. county-level poverty rates for 2021, with each county colored along a threshold scale of green shades; hovering reveals a tooltip with the county name and its exact percentage. The map is rendered as SVG using D3 v7’s `d3.geoPath` and TopoJSON `topojson.feature` to draw county boundaries, while a separate mesh path outlines counties lacking data. Poverty data is loaded from a CSV via `d3.csv`, and the color legend is generated with the d3-legend library. The visualization also includes a title and uses a linear scale to position the legend.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/469d0d83198d4278b0e079ea0fe9e0b6?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}