{"version":"1.0","type":"rich","title":"Aggregation by Country + Dropdown","description":"This example visualizes video views from the Harvard/MITx online course dataset (academic year 2013) on a world map. A dropdown menu filters which course’s view counts are displayed as circles, with radius encoding the total views per country via `scaleSqrt`. Hovering reveals the country name and view count. The map uses a Mercator projection (`geoMercator`) with `geoPath` to render land and graticules from World Atlas TopoJSON, while the interface is built with React and the `react-dropdown` component.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/4ca85be822c941a98b649c88dc4b717e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}