{"version":"1.0","type":"rich","title":"Harvard X-MITx Viewership by Country","description":"This example maps HarvardX-MITx course viewership by country for AY2013. A geoMercator projection with d3.geoPath renders the world map from World Atlas TopoJSON, while overlaid circles mark viewer locations using linear scales derived from the dataset. The visualization uses React to manage state and render SVG elements, with d3.json and d3.tsv loading the map topology and viewership data. Graticules, landmasses, and interiors are styled separately to distinguish geographic features from data points.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b70514faa8584a4b98e965e546bc4af8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}