{"version":"1.0","type":"rich","title":"Choropleth Map","description":"A choropleth map colors countries by income group using a sequential color scale from `d3.scaleOrdinal` and `d3.schemeSpectral`. The visualization renders with `d3.geoPath` and a natural Earth projection, drawing geographic features from TopoJSON data loaded via `d3.json` and `d3.tsv`. Pan and zoom are enabled through `d3.zoom`, and a custom legend component built with SVG elements displays the color scale. Hovering highlights individual countries, while tooltips show country names and income group values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/38d098e42adf4ade83386f8cbc1d8c2c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}