This paper discusses the development and testing of digital image processing, mapping, and classification techniques applied to the various tasks of computer-assisted aerial archaeology. These techniques are presented specifically in the context of the Aerial Archaeology System (AAS) -a software package proposed as an integral component of the archaeologist's geographical information system (GIS) toolset. The AAS was described in an earlier CAA paper (Redfem 1999a): the emphasis of the current

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... aper is therefore on the developments made in the last 2 years, which include the development of a classification system and the scientific testing of other aspects of the AAS.