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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Map showing length of freeze-free season in the Salina quadrangle, Utah
In general, long freeze-free periods occur at low elevations, and short freeze-free periods occur at high elevations. But some valley floors have shorter freeze-free seasons than the glancing foothills because air cooled at high elevations flows downward and is trapped in the valleys. This temperature pattern occurs in the western part of the quadrangle in Rabbit Valley, Grass Valley, and the Sevi
Map showing normal annual and monthly precipitation in the Salina quadrangle, Utah
No abstract available.
Map showing ranges in probable maximum well yield from water-bearing rocks in the San Francisco Bay region, California
This map presents generalized information regarding the probable maximum yields of wells in the rocks of the San Francisco Bay region. It is intended to serve the needs of planners and other persons seeking general information on potential yields from water wells. Four ranges in probable yield, based on adequacy of the range in yield for major beneficial uses of water, are given. The ranges are
Map showing relative ages of faults in the Sugar House Quadrangle, Salt Lake County, Utah
No abstract available.
Map showing relative ease of excavation in the Aspen Quadrangle, Pitkin County, Colorado
No abstract available.
Map showing relative ease of excavation in the Salina quadrangle, Utah
This map shows the relative ease (or difficulty) with which rocks and surficial deposits can be excavated. Because of rapidly changing technology of excavation and considerable local variability of many rock units, it is not practical to specifically categorize rock units according to type of equipment needed for their excavations. However, it may be stated in general that rock units classed as ve