WM to Unreal - World Dimensions, Scale and Resolution.

Thanks HYLK! I think part of the issue is making sense of what is 1:1 and how to define it in unreal engine. Easiest way for me to understand it is skipping to the end result. If I export a map at 16km x 16km Width and Height in World machine at 8k resolution, how would I properly define it in Unreal?

TY