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USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps. 

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Controlled photomosaic of the MTM 40312 Quadrangle, northern Arabia region of Mars

This photomosaic covers part of an area of special scientific interest on Mars.  It is published in a series designed to support topical studies, which is not expected to result in systematic coverage of the plant.  The mosaic was compiled by digital methods described by Batson (1987) and Edwards (1987).