Aggregation by Country using Map
This visualization maps video views from the Harvardx/MITx course-person dataset for 2013, with circle size encoding view counts per location. It uses a Mercator projection via `geoMercator` and `geoPath` from d3, rendering country boundaries from World Atlas TopoJSON and graticules. React components manage state with `useDataViews` and `useDataMap`, while circles display tooltips showing country names on hover.
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.