So, in Wilbur, I've figured out how to Select>>From Terrain>>Facing Direction>>Azimuth Angle to snag particular facing directions of my mountain slopes, but the thing that is throwing me is the Elevation Angle selection. I would assume that this feature would allow me to select particular slope angles (i.e. steeper portions of the slope as opposed to those that are more gradual), but I was wondering about the selection constraints. I see constraints for both Minimum and Maximum Elevation angles, but these are broken down into a Start and End value. I was wondering if Waldonrate (or anyone else familiar with this feature, for that matter) might be able to clarify what these values represent and how they are interpreted in terms of selecting from the terrain.