Please see attached files.
See the closest red handle. Notice the line extending back and the far red handle. The little yellow info box that says "Red scale about opposite point" did not show in the screen shot. This handle will mean the shape's edges will move on the near side line only, and only straight out along the red axis. The grid of hidden lines does become stretched uniformly
In the other direction scaling, the shape will not be exactly the same. Since it has a curve in it, it will stretch that curve some--straight out, but the high/low points and the relative shape should be the same. I assume this stretch is inconsequential for the purposes of showing your terrain.
Screen shot 2012-07-17 at 11.40.11 AM.png
Screen shot 2012-07-17 at 11.58.15 AM.png
