{"version":"1.0","type":"rich","title":"US Map with County Centroids using D3.js","description":"A US map displays state boundaries in light green with small red circles marking county centroids, computed via `d3.geoPath` and `d3.geoCentroid` from TopoJSON data. The visualization uses D3 v5 and the `geoAlbersUsa` projection, rendering SVG shapes. County population and COVID-19 case data from a CSV file determines circle sizing, though the visible circles have a fixed radius. Zooming is enabled through `d3.zoom`, and the map is drawn from the us-atlas counties-10m.json dataset.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/984cc638af9e44e48550c94d49b7e356?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}