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A comprehensive mapping of spectral variations is presented for one octant of the SuperPan data set of the Imager for Mars Pathfinder. Both left and right eye images are analyzed, simultaneously utilizing all respective spectral bands for each. We achieve fine discrimination of over 20 surface units using a self-organizing map. Agreements with earlier analyses are very good where comparison is available. In spite of the separate analysis of the left and right eye data, which cover different spectral windows, many classes show similar spatial distribution in both images. The SOM clustering produced a refinement within the unit formerly labeled as "black rock", discovered previously undiscussed units that may be coatings on rocks, and presented some disagreements with existing units. The clustering tools are part of HYPEREYE, a research software developed with NASA/OSSA AISRP support.