{"version":"1.0","type":"rich","title":"Circles on Map","description":"This example displays a natural Earth choropleth map with circles sized by population, colored by a categorical scale, and overlaid with a clickable legend. It uses TopoJSON world-atlas data and CSV population figures merged by country ID, rendered as SVG paths via `geoPath` and `geoNaturalEarth1`. Users can zoom with `d3.zoom` and filter countries by clicking legend colors, dimming non-matching regions. The code applies `scaleOrdinal` with `schemeSpectral` and projects centroids from geographic coordinates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/166c5f1760c24a5097c2f627d8cb7dce?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}