Abstract: The automation of photogrammetric orientation procedures is a topic of major interest. Several methods to automate also the measurement of ground control points have been suggested, but there is at the moment no general solution to the problem. The approach presented in this paper suggests a coarse-to-fine strategy by means of an object hierarchy extracted from an existing digital map. Large objects may be applied to the coarser levels of an image pyramid, smaller but more well- defined objects to the finer levels. Tests on a single pair of large-scale aerial images are successfully conducted, and seems to indicate that there are no critical parameters. !17
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