{"version":"1.0","type":"rich","title":"Fork of map of epa data sites","description":"This visualization displays EPA air quality monitoring sites across the contiguous United States, with each site represented by a circle positioned according to its recorded latitude and longitude. The map overlays these data points on a geographic outline of US states, rendered using the `geoAlbersUsa` projection and `geoPath` from d3-geo, with state boundaries and interior borders drawn from TopoJSON data. Circle positions are projected through the same geo projection, and while the code includes a `scaleSqrt` for sizing by AQI values, the rendered circles use a fixed radius of 5 pixels. The visualization is built with React and d3.v5, loading CSV data via d3-fetch and US state geometries from the us-atlas TopoJSON file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/75e4f05e878043a0975f485e05a1e448?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}