County Boundaries of the United States, 1990

Description:

This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extracting county polygon features from the individual 1:2,000,000-scale State boundary Digital Line Graph (DLG) files produced by the U.S. Geological Survey. These files were then merged into a single file and the boundaries were modified to what they were in 1990. This is a revised version of the November 2004 map layer. This layer is part of the 1997-2014 edition of the National Atlas of the United States. These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the National Atlas of the United States in the use of these data. U.S. Geological Survey. (2005). County Boundaries of the United States, 1990. USGS. Available at: http://purl.stanford.edu/pb817xw6983 {"gdaId" : 6065726} None. Acknowledgment of the National Atlas of the United States of America would be appreciated in products derived from these data. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

Creator:

Geological Survey (U.S.)

Publisher:

Geological Survey (U.S.)

Provider:

Stanford

Collection:

National atlas of the United States of America, 1997-2014

Resource Class:

Datasets

Resource Type:

Polygon data

Subject:

Administrative and political divisions, Counties, and Boundaries

Temporal Coverage:

1990-1980

Date Issued:

2005

Spatial Coverage:

United States, Alaska, Alabama, Arizona, Arkansas, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York (State), North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington (D.C.), Washington (State), West Virginia, Wisconsin, Wyoming, Puerto Rico, and United States. Virgin Islands

Access Rights:

Public

Format:

Shapefile

More details at:

https://purl.stanford.edu/pb817xw6983