Several times I had the experience, that temporary RAs (e.g. for military exercises) that were announced by (national) NOTAMs giving a huge circle around a specific location were also shown in neighbour countries, where they are clearly not valid. For example a Czech TRA for sure has no relevance in German or Polish airspace, as the authorities of one country do not have legal competence in another country. Such false map-markings in the not affected country are misleading and confusing. If there really are multi-national TRAs (which may rarely be the case), then the respective national parts of it would be published in each nation‘s own NOTAMs, adding up like a puzzle.
Therefore I highly recommend to create an algorithm, that the highlighted TRA on the map ALWAYS ends at the borders of the respective country which issued this specific TRA - even if the original NOTAM specifies a huge circle that reaches beyond this countries borders.
People said: the marking on the map is as unprecise, as the NOTAM itself may be. That‘s not a valid argument: The NOTAM legally assumes, that its validity ends at the borders, therefore they should be read and interpreted accordingly. So should SkyDemon do.