{"version":"1.0","type":"rich","title":"EdX Viewership Map, 2013","description":"This map visualizes the geographic distribution of video views in the Harvardx/MITx online courses for the academic year 2013. Circles sized by view count appear at viewer locations across a Mercator-projected world map, with hover tooltips showing latitude, longitude, and country. The visualization uses React for rendering, d3.geoMercator and d3.geoPath for map projection, and d3.scaleSqrt for circle sizing. Data comes from a CSV of course-person records, while the map boundaries use TopoJSON from the World Atlas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/44923f0b06424f9abde5e29226b405ca?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}