So I'm making a filled map of travel times around Europe from a given starting location, and for most of the map states work wonderfully. However, places like Slovenia are grouped into hundreds of Municipalities, and I would prefer to have them represented together as the country. On the flip side, the UK is only broken into England, Scotland, Wales, and Northern Ireland, and I would like to include more detailed regions in that area. I'm brand new to Tableau. How should I format my spreadsheet and use Tableau to effect this?
Oh, and I'm using Tableau Public, so I'm limited to the tools available to Public.