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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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Geologic map of the Sinus Sabaeus quadrangle of the Mars

The area included in the Sinus Sabaeus quadrangle represents an ancient cratered surface that has been modified by a combination of impact cratering, fluvial, eolian, and, probably, volcanic processes. Impact cratering has been the dominant process. Cumulative frequencies of craters larger than 20 km for the entire quadrangle (fig. 4) are only about a factor of two below the idealized lunar steady

Geologic map of the Talkeetna Quadrangle, Alaska

No abstract available.