Maps are made up of various elements including the following
In Supreme Ruler 2020 there are 16 terrain types.
All land types except 'Mountain' may be flat-ground or high-ground; Mountain terrain is always high ground.
For Details see Terrain Tiles.
In any Campaign or Scenario, up to 255 regions may be active. Each location (hex) on the map has an 'Ownership' and and 'Loyalty' region.
International Waters are owned/loyal to the 'UN', which provides transit access to all regions, and resupply to none.
When new territory is captured, it remains 'Loyal' to its original owner.