With maps on MapTiler Cloud, it is possible to set disputed borders according to the point of view of the selected country. For example, in the case of Kashmir, it is possible to display India's claims, Pakistan's claims, China's claims, or see the whole territory as a disputed area.
Show the borders according to the country's policy
Select Streets map → Customize a copy → Misc → Preferred country borders. Here select from the drop-down list the country which point of view you prefer.
Change borders in the advanced Edit tool
To create a map fitting the point of view of the selected country, go to MapTiler Cloud → select any map → Edit a copy → in the left panel, and select the layer
boundary_2_z5-_disputed. Here you can use new filters
disputed_name (string), and
For example, if you want to see Crimea as part of Ukraine, add the filter
claimed_by == UA, if you want to display it as part of Russia, you have to add the filter
claimed_by == RU. The default value is unset and therefore shows the whole territory as a disputed area.
Tagging disputed borders in OpenStreetMap
The information about disputed borders is provided by the OpenStreetMap project. It uses the disputed_name and claimed_by tags, which were not officially approved by the community, but they are widely used. As of January 2020, you can see this tagging for instance in Western Sahara, South Sudan, Crimea, or Kashmir.