The process of using a stereoplotter to record and convert measurements made from a stereoscopic model into a drawing or map. A stereoscopic model or hologram is a 3-dimensional optical image produced by combining the images from two overlapping aerial photographs, or other remotely sensed imagery (taken at slightly different angles) of the same area. A stereoplotter uses automated photogrammetric techniques to plot contour lines and geographic features from a stereoscopic model on to map using a coordinate system. (See photogrammetry and stereoplotter).