Samenvatting
The practices of the Pennsylvania department of highways in using photogrammetric methods for large-scale topographic mapping and production of cross sections from stereoscopic models are described. The major benefit derived from these methods has accured to design location, but they are also employed in final design and earthwork quantities. The equipment, process sequence, computer programs, and output of the process are described. New approaches in determination of final pay quantities and an integrated design concept are discussed.