Skip to main content
U.S. flag

An official website of the United States government

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. 

Filter Total Items: 9586

Least-squares adjustment of triangles and quadrilaterals in which all angles and distances are observed. Least-squares adjustment of triangles and quadrilaterals in which all angles and distances are observed.

The solutions for combined triangulation-trilateration least-squares adjustment of triangles and quadrilaterals, in which all angles and distances are observed, are developed. The triangle is adjusted by the method of observations only, and the quadrilateral is adjusted by the method of indirect observations. The problem of choosing the proper weight factor relating the angle...

Lithotectonic terrane map of Alaska (west of the 141st meridian) Lithotectonic terrane map of Alaska (west of the 141st meridian)

No abstract available.

Lithotectonic terrane map of the western conterminous United States Lithotectonic terrane map of the western conterminous United States

No abstract available.
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Minerals, Energy, and Geophysics Science Center

Lithotectonic terrane map of western Canada and southeastern Alaska Lithotectonic terrane map of western Canada and southeastern Alaska

No abstract available.

Location of coal and carbonaceous shale beds exposed in the eastern part of the Kemmerer 15-minute Quadrangle, Lincoln County, Wyoming Location of coal and carbonaceous shale beds exposed in the eastern part of the Kemmerer 15-minute Quadrangle, Lincoln County, Wyoming

No abstract available.

Low-flow characteristics and chemical quality of streams in the Culpeper geologic basin, Virginia and Maryland Low-flow characteristics and chemical quality of streams in the Culpeper geologic basin, Virginia and Maryland

No abstract available.
Was this page helpful?