3. Select the Advanced Properties option within the DTM Extraction dialog or DTM Extraction Properties from the LPS ATE dialog Edit menu.
4. Define output DTM projection, spheroid, datum and units (horizontal and vertical). This step is optional.
5. Specify contour interval to be used for the automatic creation of a Contour Map (that is, 3D Shape file) using the output DTM.
6. Enable the option that creates a DTM Point Status image depicting the quality of the automatically extracted 3D mass points.
7. Graphically preview and select the image pairs from the block to be used for DTM extraction. By default, the software uses all of the image pairs above an overlap percentage defined by you. The default is 50%, but you may modify the percentage value.