{"version":"1.0","type":"rich","title":"Fork of Pollution in US with counties by React and d3","description":"This interactive choropleth map visualizes PM2.5 concentration levels across US counties from 2000 to 2018. A vertical slider and play button animate through time, updating the color-coded counties using React’s state management. The SVG map uses `d3.geoPath` with `geoIdentity` projection for county and state boundaries from the us-atlas TopoJSON. Data from a CSV file is filtered by year, and the sequential YlGnBu color scale is applied via `d3.scaleSequential` and `d3.interpolateYlGnBu`. Hovering reveals county and state names with pollution values via tooltips.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0223c19342c84290ac40649bd8c6778c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}