{"version":"1.0","type":"rich","title":"Tweaking WenLei Cao's MA Safety Map","description":"This visualization displays the global distribution of viewer engagement for MITx courses, using a Mercator-projected world map rendered with `d3.geoPath` and topojson land boundaries. Circles sized with `d3.scaleSqrt` represent total views per country, while a React dropdown filters by specific courses. The map is built with React hooks (`useState`, `useEffect`) loading CSV data containing longitude, latitude, and view counts, with tooltips detailing country-level statistics.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b44e37c8b7bc4130ac81b8f681e69657?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}