The current system from e.g. Google is pretty weak IMO, it's made to not piss the sides off, so if you load up Google Maps in Pakistan you see the disputed territories belonging to Pakistan, and in India you see them belonging to India. But if it's the stuff of history it would be interesting to display the areas overlapping each other, or to mark that there was active conflict over the territory at that point in time.

> The current system from e.g. Google is pretty weak IMO, it's made to not piss the sides off,

It is mostly respecting local regulation on the topic. If you are in a country that does not regulate the area you see the disputed areas marked.

Just wait till the flame wars on Taiwan and the Nine Dash Line

https://en.wikipedia.org/wiki/Nine-dash_line