Accuracy Assessment of Digitized Apollo and Lunar Orbiter Imagery for Lunar Mapping.

We evaluated the utility of using modern "softcopy" digital mapping techniques for extracting digital elevation models (DEMs) from Lunar Orbiter (LO) and Apollo imagery. This imagery was used in the 1960s-70s for mapping, mission planning, and control purposes. Previous work with LO imagery was difficult due to image artifacts, and the mapping was not controlled to any horizontal or vertical datum [1]. Mapping with Apollo imagery used 2 different control networks. The hardcopy maps that resulted are the Lunar Topographic Orthophotomap (LTO) and Lunar Orthophotomap (LO) map series [1].