{"version":"1.0","type":"rich","title":"Proportional symbols map","description":"This proportional symbols map overlays circles on a U.S. state map to visualize grocery cost indices, with the ten most expensive states highlighted in red and a legend showing cost values. The visualization uses D3 v3’s `d3.geo.path`, TopoJSON, and a queue to load map boundaries, state centroids, and cost data. Point radii are scaled with `d3.scale.sqrt`, and hovering a circle triggers a tooltip, dims other symbols, and uses an SVG transition for emphasis.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/94079147eb2a4b8e9f2a6ec9ef7e6660?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}