After completing the orientation process, the original imageries
were resampled to generate epipolar images, which were used to
form the stereo model. The images were viewed in stereo on the
monitor using the CrystalEyes stereo viewing system. While viewing
the images in stereo, topographic features of interest such as
roads, buildings and coastal line were collected. Together with
other reference data, the images and collected topographic features
were analyzed and special features were digitized as needed.