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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January 1, 1975

Map showing drainage areas, Ludlow Quadrangle, Massachusetts Map showing drainage areas, Ludlow Quadrangle, Massachusetts

No abstract available.

January 1, 1975

Map showing drainage areas, Marlborough Quadrangle, Connecticut Map showing drainage areas, Marlborough Quadrangle, Connecticut

No abstract available.

January 1, 1975

Map showing drainage areas, Middletown quadrangle, Connecticut Map showing drainage areas, Middletown quadrangle, Connecticut

No abstract available.

January 1, 1975

Map showing drainage areas, Mount Tom Quadrangle, Massachusetts Map showing drainage areas, Mount Tom Quadrangle, Massachusetts

No abstract available.

January 1, 1975

Map showing drainage areas, New Haven-Woodmont quadrangles, Connecticut Map showing drainage areas, New Haven-Woodmont quadrangles, Connecticut

No abstract available.

January 1, 1975

Map showing drainage areas, Niantic quadrangle, Connecticut Map showing drainage areas, Niantic quadrangle, Connecticut

No abstract available.

January 1, 1975

Map showing drainage areas, Old Lyme Quadrangle, Connecticut Map showing drainage areas, Old Lyme Quadrangle, Connecticut

No abstract available.

January 1, 1975

Map showing drainage areas, West Springfield quadrangle, Massachusetts-Connecticut Map showing drainage areas, West Springfield quadrangle, Massachusetts-Connecticut

No abstract available.

January 1, 1975

Map showing flood-prone areas, Boulder-Fort Collins-Greeley area, Front Range Urban Corridor, Colorado Map showing flood-prone areas, Boulder-Fort Collins-Greeley area, Front Range Urban Corridor, Colorado

No abstract available.

January 1, 1975

Map showing flood-prone areas, Colorado Springs-Castle Rock area, Front Range Urban Corridor, Colorado Map showing flood-prone areas, Colorado Springs-Castle Rock area, Front Range Urban Corridor, Colorado

No abstract available.

January 1, 1975

Map showing flood-prone areas, greater Denver area, Front Range Urban Corridor, Colorado Map showing flood-prone areas, greater Denver area, Front Range Urban Corridor, Colorado

The rapid growth of population in the Front Range Urban Corridor of Colorado is causing intense competition for available land resources. One form of competition posing serious problems in indiscriminate development on flood plains along creeks and rivers. Flood plains are natural features of the landscape developed by streams in carry water in excess of channel capacity. Although not...

January 1, 1975

Map showing fluorspar deposits in Colorado Map showing fluorspar deposits in Colorado

Increased fluorine consumption (U.S. Bureau of Mines, 1946-1971) coupled with limited proved reserves has stimulated extensive exploration for fluorine and intensive research into developing new sources of fluorine or substitutes. A summary of the distribution, geochemical and geologic environments, and production history of selected fluorspar occurrences, deposits, and districts is...