{"version":"1.0","type":"rich","title":"MI ZIP Codes Pop. Density","description":"A choropleth map of Michigan ZIP code tabulation areas visualizes population density using an azimuthal equal-area projection, with each postal region colored by its population-per-land-area ratio. The visualization uses D3.js's `geoAzimuthalEqualArea` projection and `geoPath` to render SVG paths, overlaying administrative boundaries from TopoJSON. Population data from Michigan-demographics.com is joined with ZIP code geometries, and a linear scale maps density values to opacity levels between 0.3 and 1. Hovering reveals the ZIP code and total population.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/601389ce41134e19ac7218a1af7f2bcd?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}