{"version":"1.0","type":"rich","title":"Choropleth map","description":"A choropleth map colors countries by economic classification using a purple ordinal scale and natural Earth projection. The visualization loads world geometry from TopoJSON and country names from TSV data via `d3.json` and `d3.tsv`, then renders paths with `d3.geoPath`. A custom color legend built with SVG circles and text appears in the corner, while `d3.zoom` enables panning and zooming over the map.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/355595d7983040bfa211568bc42c6c69?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}