{"version":"1.0","type":"rich","title":"Proportional Symbols Map","description":"A Proportional Symbols Map displays the cost index for each U.S. state, with larger circles indicating higher costs and the top ten states highlighted in red. The visualization uses a Mercator projection via `d3.geoMercator` and `d3.geoPath` to render state boundaries from a GeoJSON file. Circle radii are scaled from CSV data, and `d3.scaleThreshold` with `d3.schemeBlues` provides color encoding. The map is drawn in SVG with D3 v6, using `join()` to bind data points to circle elements and tooltips showing state names and cost values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d5b058e949934c8ca7fbfb584caeee0a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}