{"version":"1.0","type":"rich","title":"Untitled","description":"This choropleth map shows the population distribution across U.S. counties, with a color scale from light blue to red indicating population magnitude. The visualization is rendered as SVG using D3 v7, employing `d3.geoAlbersUsa` for projection and `d3.geoPath` to draw county boundaries from `counties.json`. Population data is loaded from `PopulationEstimates.csv` and matched to counties by name, with a tooltip showing county name and population on mouseover. The code uses a sequential color scale with an RGB interpolator.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d6b964cbd4da45ec943a408ad0932803?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}