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GIS Data

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 Mare Australe area of Mars Geologic map of the Mare Australe area of Mars

The south polar region of Mars is among the most geologically diverse on the planet. The areas is within the heavily cratered hemisphere of Mars but is distinguished by a variety of younger, regionally extensive deposits and an assemblage of unique erosional forms. The spectrum of units varies from the oldest to the youngest on the planet. The oldest unit, typifying the cratered...

Geologic map of the Mare Tyrrhenum Quadrangle of Mars Geologic map of the Mare Tyrrhenum Quadrangle of Mars

The Mare Tyrrhenum quadrangle is bound by lat 0˚ and 30˚ S and long 225˚ W. and 270˚ W. The central part of the quadrangle is dominated by Tyrrhena Patera, a large shield volcano, and associated low-albedo ridged plains that probably are basaltic lava flows similar to the lunar maria. The western, northern, and eastern margins of the quadrangle are located in cratered terrains of higher...

Geologic map of the New Windsor Quadrangle, Carroll County, Maryland Geologic map of the New Windsor Quadrangle, Carroll County, Maryland

The pattern of rock units in the geologic map of the New Windsor quadrangle has been affected by three distinguishable generations of folds; following the usage of Tobisch and Fleuty (1969) and Higgins (1973), the fold generations are named for localities where they are well displayed.

Geologic map of the Phoenicis Lacus Quadrangle of Mars Geologic map of the Phoenicis Lacus Quadrangle of Mars

The Phoenicis Lacus quadrangle (named Lake of the Pheonix by Schiaparelli, 1877) includes some of the largest geologic features recognized on the terrestrial planets. Arsia and Pavonis Montes, (“South Spot” and “Middle Spot” of Mariner 9) rise 18 and 17 km, respectively, above the surrounding plateau to an elevation of about 27 km above the 6.1 millibar base level. These mountains and...
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