{"version":"1.0","type":"rich","title":"Sophie's version: Aggregation by Country using Excel + Dropdowns!","description":"This example visualizes video views for HarvardX/MITx online courses in 2013, aggregated by country on a world map. Circles sized by `d3.scaleSqrt` represent total views per location, with a dropdown menu to filter by individual course. Data is loaded via `d3.csv` from a gist, while geographic boundaries come from World Atlas TopoJSON. The map uses a Mercator projection via `d3.geoMercator` and `d3.geoPath`, with graticules and land masses rendered as SVG paths, and tooltips show course and view counts.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/48a4a613328f4f8a906b107104020d6a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}