{"version":"1.0","type":"rich","title":"Proportional symbols map","description":"A proportional symbol map displays the relative housing cost index for each U.S. state, with circle size scaled by the square-root of the housing cost value and the top ten most expensive states highlighted in red. The visualization uses D3 v3 with `d3.geo.path` to render state boundaries from TopoJSON and U.S. state centroids, overlaid with circles sized via `d3.scale.sqrt`. Hovering over a symbol reveals a tooltip with the state name and its housing cost.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/265ac4fde00a4b708653d7019b55d7bc?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}