{"version":"1.0","type":"rich","title":"Fork of  Assignment 9: Choropleth Map","description":"This choropleth map visualizes the average Air Quality Index (AQI) across U.S. counties, encoded through a Blues color scale with a threshold legend. It uses `d3.geoPath` to render county boundaries from TopoJSON data, while `d3.map` associates each county with AQI values from a CSV file. The visualization employs `d3.scaleThreshold` and `d3.schemeBlues` for color mapping, with white state boundaries overlaid for geographic context. The SVG rendering approach displays county-level data without interactivity beyond tooltips showing county names and percentages.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2e657254135f4bc4ab23dea257b812c5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}