Ok - now we've got the larger data set fed into the viz, and not the pre-aggregated dataset. The goal now is to get the number of views per country to show up in the tooltip. I'd also like to add a drop down menu so we can filter by course and institution.

This 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.

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.