This video shows how easy it is to create an accurate Digital Terrain Model (DTM) from scratch in 3DM Analyst. A pair of images taken from slightly different locations are loaded into the software and control points are digitised to georeference the data. (The control points are not required for this to work, only to specify the desired co-ordinate system.) The software then automatically reverse-engineers the camera locations and then generates a DTM of about 200,000 points in about 30 seconds. http://www.adamtech.com.au/