{"version":"1.0","type":"rich","title":"Choropleth","description":"A world map rendered as a choropleth shades countries by population using a linear color scale. The visualization loads GeoJSON country borders from a CartoDB SQL query and draws them with D3’s `d3.geo.path` and a Robinson projection (`d3.geo.robinson`), with a graticule outline for the globe background. A `d3.behavior.zoom` handler pans and scales the entire SVG group, while mouseover and mouseout events adjust stroke width and fill opacity on individual country paths.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-4448106?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}