{"version":"1.0","type":"rich","title":"Untitled","description":"This choropleth map shows population density per square mile across California counties, using a sequential orange-red color scale with a threshold legend. The visualization loads GeoJSON topology data and renders county boundaries as SVG paths via `d3.geoPath`. Colors are assigned by county ID using `d3.schemeOrRd[9]`, while the legend uses `d3.scaleThreshold` and `d3.axisBottom` to display the value ranges. County outlines are drawn from a separate topology object with a semi-transparent black stroke.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4aafdacd64b14cda9e64c9671c5041a3?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}