Sophie's version: Aggregation by Country using Map
This interactive map visualizes video views from the Harvardx/MITx Course-Person Dataset for 2013, with circles sized using a square-root scale to represent view counts per location. Built with React and D3 v5, it uses d3.geoMercator and d3.geoPath to render world map boundaries from World Atlas Topojson, while data points are positioned by longitude and latitude. Hovering over a circle reveals the aggregated view count and country name.
AI-generated descriptionThis is a visualization of the Harvardx/MITx Course-Person Dataset for the academic year 2013. The data shows the number of video views of the online courses, represented by the circles on the map. The data can be found here.
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The world map behind the points is a Mercator type map using the World Atlas TopoJSON. The points are off by a small fraction (down and to the left) however it fits much better on the Mercator projection over the Natural Earth projection. When the user hovers over each point, they can see the latitude and logitude of that deployment.