UK update - photogrammetry performance / quality

[CptLucky8]

@SvenZ

At 500 ft altitude, it pretty much looks the same with terrain at 100 or 200, the only difference, 1.65 GiB extra data you can’t see from that height. At 2,000 ft terrain 200 is still on the short side, the horizon looks rather bare.

There is another issue affecting terrain LOD and this might also be a factor with PG areas if the expected and the computer LOD are different:

LOD Problems - Distances revisited