{"version":"1.0","type":"rich","title":"Choropleth Map","description":"A choropleth map colors countries by their economic classification using an ordinal color scale derived from `d3.schemeSpectral`. A clickable color legend uses `d3.scaleOrdinal` to let the user select a specific economy type, which highlights matching countries via a CSS `.highlighted` class while dimming others. The visualization, built with `d3.geoPath` and `d3.geoNaturalEarth1`, renders an SVG world map with zoom support and tooltips, using COVID-19 case data merged from CSV files.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e75c191857ed4f9fa9b92a84813e8626?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}