Help with real-world terrain scaling

I’m adding a terrain based on a real-world elevation model to my map. The real-world dimensions are 16,384 meters x 16,384 m and that is the size I want in game too (1,6384,000 uu square). The .png heightmap is 4096 px x 4096 px, so each pixel represents about 4m.

I followed the tutorial examples, and I’ve referred to Landscape Technical Guide | Unreal Engine Documentation
but I’m still not sure that the settings I get will both preserve the original data and be optimal for gameplay.

What settings do I use to reproduce the proper scale?