Two experiments were conducted by the U. S. Geological Survey using LANDSAT-1 multi-spectral scanner (HSS) data to identify ground features that are indicators of sulfidebearing rock; a nearby known sulfide deposit was used as a "training area" (control). The first experiment used visual examination of false-color composites to locate possibly favorable areas; the second employed classification by digital computer processing.
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Schmidt et al. (1975) studied this question.
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