The most ignorant part of those types of projects is usually the projection of the idea of nation states defined by clearly communicated sphere of influence backwards way before the 1800s. That concept simply does not hold up. The uncertainty of borders was systemic before that and sometimes simply not a thing at all. Uncertainty visualization in geographic contexts never made it into mainstream visualizations and data formats so far.

https://en.wikipedia.org/wiki/Mandala_(political_model)