{"version":"1.0","type":"rich","title":"Aggregation by Country using Map","description":"This example visualizes the total video views from the Harvardx/MITx Course-Person Dataset, aggregated by country and displayed as graduated circles over a Mercator-projected world map. The map uses d3.geoMercator and d3.geoPath to render landmasses, graticules, and country borders from World Atlas TopoJSON, while d3.scaleSqrt maps view counts to circle radii. Points are positioned using d3.projection, and hovering reveals the country and view count via an SVG `<title>` tooltip.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/46044d6762ed4c7a814e598849037bd1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}