Line map production with Metric Camera data

The way to derive empiric exposure functions for optimal picture quality and to get the Modulation Transfer Function (MTF) from edge analysis; and photogrammetric evaluations of Spacelab Metric Camera imagery to derive line maps and quasi line maps are dealt with. It is possible to derive sufficient information from high altitude photography to estimate an empiric solar angle and diaphragm depending empiric exposure function for space photography. From edge analyses the MTF shows 40 line pairs per mm for extremely high constrast, which is equivalent to 10 m pixel size on the ground. The imagery is sufficient for topographic mapping on scales of 1:100 000, and meets all requirements of a reference data base for medium scale mapping purposes. Conventional line maps derived from photogrammetric evaluation with analytical plotters and quasi line maps from digital edge-enhanced Metric Camera imagery are promising for map production in developing countries.