{"version":"1.0","type":"rich","title":"Fixed projection for US States","description":"This map visualization uses a fixed projection to display the four major U.S. census regions—Northeast, Midwest, South, and West—as distinct colored areas. It renders US state boundaries from the `us-10m` TopoJSON dataset, merging state geometries by regional ID using the `topojson` `merge` function. The D3 `select` and `geoPath` APIs generate SVG paths for each region, with styles defined in a stylesheet assigning each region a unique fill color.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b0e54f1ab4c144e788b6998d5e9520aa?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}