{"version":"1.0","type":"rich","title":"22_Choropleth Map","description":"This choropleth map colors countries by income group using a sequential spectral color scale, with hover highlighting and zoom/pan via d3.zoom. It loads World Atlas TopoJSON and TSV data through d3.json and d3.tsv, then renders geographic paths with d3.geoPath and a natural Earth projection. A custom color legend built with SVG circles and text appears on the left, and tooltips show country names and values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/bc87028ffe7a4889904f561e90d1a599?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}