Exporting a digital elevation model to a text file
You can export the digital elevation model (DEM) into a text file. The file will contain the x and y coordinates and the gray levels representing the elevation values.
Under Input DEM in the File box, type the path where the DEM is found or click Browse to select the file.
In the DEM channel list, click the DEM channel or click Select to view the choices and choose a channel.
In the Failure value box, type the value used to represent the failed pixels in the input DEM.
In the Background value box, type the value used to represent the background.
Under Input Window, click:
Full image to export the entire DEM.
Window to export a specific area of the DEM. In the Offset boxes, type the pixel and line coordinates of the upper-left corner of the area. In the Size boxes, type the number of pixels and lines to specify its size.
In the Spacing box, type the sampling frequency of the pixels exported to the text file. OrthoEngine extracts the x, y, and z coordinates of every nth pixel and saves them in a file using an ASCII format. For example, typing 1 in the Spacing box generates a file with the coordinates of all the pixels in the DEM.
Under Output DEM in the File box, type the path where you will save the file or click Browse to select a location.
Select Require Supresoft DEM format if you are using the file with Supresoft products.