{"version":"1.0","type":"rich","title":"Assignment 9: Choropleth Map","description":"This choropleth map displays the percentage of adults with a bachelor's degree or higher across U.S. counties for 2015–19, using a blue color scale. The visualization loads geographic data from a TopoJSON file and county-level statistics from a CSV, then renders each county as an SVG path filled according to its value. The code uses d3.geoPath for map projections, d3.scaleThreshold for color binning, and d3.schemeBlues for the palette. A legend with a bottom axis communicates the percentage ranges, and state boundaries are overlaid as white lines.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e5dd1602ad0c45df998f255f182a46af?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}