{"version":"1.0","type":"rich","title":"A9 - choro","description":"This choropleth map visualizes county-level population estimates across the United States, with each county colored on a sequential green scale from light (approximately 900 people) to dark (up to 4 million). The map is rendered as SVG using React, with geographic boundaries drawn via `d3.geoPath` and an equirectangular projection. Population data, loaded from a local CSV file, is joined to county features by name, and counties lacking data appear in gray. The map supports interactive zooming through `d3.zoom`, transforming the SVG paths in response to user gestures.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/2bdc5eaa9cee4ea198d7cbf9996d400e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}