Actually, the issue here is primarily the lack of an SVG-based map, or other programmatic description of the shapes of regions, for each continent. If I had that, it would only take me a few hours to code up various useful overlays.
I finished drawing up the borders of BT/AT in GIS software. A few more operations and many things will be possible with those.
No ETA on the rest of the continents, though. Drawing the borders takes time, which is a limited resource. BT/AT had the advantage of being a two in one.
