I love the recent developments to the Altair library and I was wondering if there was any advice for marking pie charts at different "latitudes" or "longitudes" of a geoshape. I have attached an image below showing a small example of what I'd like the rendered graphic to look similar to.
My understanding from the Altair/Vega documentation is that one can only mark symbols onto the marked geoshape. Would the best way forward be to create a new SVG for each of the slices of the pie chart and rotate them accordingly at each of the latitude/longitude coordinates? Any advice you can provide would be greatly appreciated! Alternatively, if there is another visualization library that is better suited for this task I would be happy to hear about it.