One of the primary advantages of processing CORONA images using rigorous methods as opposed to rubber sheeting (see Correcting Distortions) is that it makes possible analysis of the imagery in stereo and the extraction of topographic data from stereo pairs. Our previous work with these possibilities demonstrates some of the ways in which CORONA can be used to improve recognition and mapping of archaeological sites and larger landscapes when they are viewed in 3D (Casana and Cothren 2008). The following sections outline methods for stereo analysis and digital elevation model (DEM) extraction using CORONA stereo imagery, and offers examples of the many possible archaeological applications for these techniques.
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