Add air command lets you enter a new tie point which may be above the ground. Air tie points can be entered manually only.
To enter a new air point:
1. Select Add air command from the Point pulldown menu.
The Add common air point dialog opens:
If Display position hint is switched on, the software indicates the approximate location of the tie point in secondary images by a thin red line.
2. Identify an approximate location with a data click in the Active full view where you intend to enter an Air point.
The application updates the Active detail view in order to show the selected location as an orthorectified image.
3. Enter the tie point position with a data click in the Active detail view. You may move or zoom the image in the view in order to find a good tie point location.
The application adds the tie point to the list in the Tie points window. The tie point is defined in the active image.
The tie point pixels in the other images are undefined at this stage. The software selects the next image with an undefined tie point pixel in the list and updates the Secondary detail view in order to show the tie point position.
4. Enter the tie point position with a data click in the Secondary detail view.
The application recomputes the solution point for the tie point and displays the current mismatch for each image. It selects the next image with an undefined tie point pixel in the list and updates the Secondary detail view in order to show the tie point position.
5. Continue with step 4 until all tie point pixels are defined.
6. After entering the last pixel of a tie point, you can continue with step 2 if you want to place the next Air tie point.
If the tie point position can not be defined in one of the secondary images, you should select the next undefined pixel for this tie point and continue entering the tie point pixels. Use the Clean command from the Point pulldown menu in order to remove undefined pixels from a selected tie point.