This video demonstrates how to create alternate surface from an OpenRoads corridor. It also demonstrates how to display and annotate that alternate surface in a cross section.
Click the video below to play it. To view in fullscreen mode, first click the YouTube link at the bottom of the video to launch the video on the YouTube site. Then, click the fullscreen button (rightmost button at bottom of video).
Recorded in 1280 X 720 resolution.