{"version":"1.0","type":"rich","title":"Choropleth Map with Interactive Filtering","description":"A choropleth map of global economies uses color to encode income groups. Clicking a color legend item filters the map to show only that category, dimming all other countries. The map is rendered using D3’s `geoPath` with a natural Earth projection and a spectral ordinal color scale. Interactive filtering is implemented through a custom `colorLegend` with `onClick` handlers and opacity transitions. Data is loaded from the world-atlas TSV and TopoJSON files.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c37ba21d3f5540f3b16397550f73ec79?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}