VT: We’re never “done” mapping any regions – we are constantly being corrected and learning how to improve. We do, however, consider Canada, the USA, and New Zealand to be fairly well mapped out. We have a lot of territories and a researcher for Central and South America, as well. We have a ton of work to do in Australia, Africa, and other parts of the world.
The very early process was not complicated. I searched for official maps from nations, and if I couldn’t find them, then I searched academic sources, and if needed, I used whatever maps were available so that land wasn’t left blank. It’s been a long process of corrections as more information is made available, our team grows, and our research deepens.