In reworking Mid Valley, NM airport (E98), I've discovered something rather odd about the Airport Boundary when used for flattening (ADE 1.35).
Because some homes I wish to place are outside the FSX original airport boundary, I used an airport boundary polygon to both exclude autogen and to flatten an area larger than the original boundary. It excluded the autogen exactly where I wanted it, but the flatten caused huge, deep holes in a couple of locations around the airport. So I changed that polygon to exclude autogen only, and made a new one for flattening which was only outside the original airport boundary. That one flattens fine, except for where Ultimate Terrain has streams (in real life, they are small arroyos or canals (per Google Earth pix). I have UT set to depress streams by 2 meters (normally just fine) and the area of the original airport boundary does, indeed flatten these streams, but the one applied by ADE does not. Nor have I spotted any way to remove, or (other than overhead view in FSX) to even see the original boundary in ADE.
The problem is compunded by the fact that the Google Earth screenshot I'm using (appropriately "positioned" and resized) disagrees with the stream location created by UT, mostly by a couple of aircraft lengths -- Christen Eagle, so perhaps 60 or so feet).
Certainly I can shift roads and houses a little (those I create, not those done by UT) to partially compensate, but I'd like to solve this in a bit cleaner fashion, if possible.
Any thoughts or suggestions on:
1. holes for flatten
2. UT stream depression (I won't change the 2 meter depression - just need to flatten them on airport grounds)
3. how to see (better yet, remove) the original FSX airport boundary
are much appreciated.