{"version":"1.0","type":"rich","title":"Choropleth World Map w/ D3.js","description":"A choropleth world map colors countries by income group using a spectral color scale, with a legend showing the categorical mapping. The visualization is built with D3.js v5 and rendered as SVG paths projected via `d3.geoNaturalEarth1` and `d3.geoPath`. Country boundaries come from TopoJSON data (world-atlas), enriched with income attributes from a TSV file. Zooming is supported through `d3.zoom`, and the legend’s circles and labels are generated using a reusable `colorLegend` function.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c4c8eceb32e849e38b27ab474414cfe1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}