This data set portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the individual State roads layers from the 1:2,000,000-scale Digital Line Graph (DLG) data produced by the USGS. This is a revised version of the March 1999 data set.
For use with the GEOSTAC database, this data set has been compiled in order to simplify pesticide risk assesment by providing a common data set upon which all parties can perform analysis.
ground condition
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 U.S. Geological Survey in the use of these data.
897-B Harrison Street, S.E.
US Geologic Survey, at: http://www.usgs.gov/ National Atlas of the United States, at: http://www.nationalatlas.gov/mld/roadtrl.html
The data set was checked for topological consistency using the Arc/INFO command BUILD. No other checks for logical consistency were performed on this data set.
This data set includes roads for all 50 States, Puerto Rico, and the U.S. Virgin Islands. Data completeness generally reflects the content of the original DLG files.
spatial and attribute information
spatial and attribute information
spatial and attribute information
spatial and attribute information
The 2MILRD data files were originally digitized by the National Mapping Division based on the sectional maps contained in 'The National Atlas of the United States of America' published by the USGS in 1970. The files were updated and the Arc/INFO software command DLGARC was used to convert the State DLG optional-format files to Arc/INFO coverages. The individual State coverages were then merged together using the Arc/INFO command APPEND.
Roads for Puerto Rico and the U.S. Virgin Islands were added.
Some roads in Alaska were determined to be trails, and were deleted. Some ferry crossings in Alaska were added, others modified.
Project data set to Albers Equal Area and NAD 83 datum.
Import and edit original source metadata document for use with the GEOSTAC database.
Dataset copied.
The 2-letter FIPS code for the State or State equivalent in which the road is located.
U.S. Geological Survey
The representation of the entity in the data.
U.S. Geological Survey
1-dimensional element that may or may not surround a 2-dimensional element.
ESRI GIS software
Internal feature number.
ESRI
Internal number of the from-node.
U.S. Geological Survey
Internal number of the to-node.
U.S. Geological Survey
Internal number of the polygon to the left of the arc.
U.S. Geological Survey
Internal number of the polygon to the right of the arc.
U.S. Geological Survey
The length of the arc in coverage units.
U.S. Geological Survey
Internal feature number.
U.S. Geological Survey
The type of road.
U.S. Geological Survey
A route used to transport traffic between two points separated by water.
U.S. Geological Survey
A route used to transport traffic between two points separated by water and where a travel fee is collected.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway.
U.S. Geological Survey
A route that substitutes for a United States Interstate Highway or other similar expressway.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway and that is used for commercial traffic.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway, and that diverts traffic around a town.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway, and that goes through a tunnel.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway, and that goes through a tunnel and where a travel fee is collected.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway, and where a travel fee is collected.
U.S. Geological Survey
A route that is part of the United States Interstate Highway System or other similar expressway, and that is designated for truck traffic.
U.S. Geological Survey
A minor State-numbered route or other connector road.
U.S. Geological Survey
A route that substitutes for a minor State-numbered route or other connector road.
U.S. Geological Survey
A minor State-numbered route or other connector road that is used for commercial traffic.
U.S. Geological Survey
A minor State-numbered route or other connector road that diverts traffic around a town.
U.S. Geological Survey
A minor State-numbered route or other connector road where a travel fee is collected.
U.S. Geological Survey
A major State-numbered route or a minor United States-numbered highway.
U.S. Geological Survey
A route that substitutes for a major State-numbered route or a minor United States-numbered highway.
U.S. Geological Survey
A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that diverts traffic around a town.
U.S. Geological Survey
A major State-numbered route or a minor United States-numbered highway that is used for commercial traffic.
U.S. Geological Survey
A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that is used for commercial traffic.
U.S. Geological Survey
A major State-numbered route or a minor United States-numbered highway that diverts traffic around a town.
U.S. Geological Survey
A route that substitutes for a major State-numbered route or a minor United States-numbered highway, and that goes through a tunnel.
U.S. Geological Survey
A major State-numbered route or a minor United States-numbered highway where a travel fee is collected.
U.S. Geological Survey
A major State-numbered route or a minor United States-numbered highway that is designated for truck traffic.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes.
U.S. Geological Survey
A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes.
U.S. Geological Survey
A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes, and that diverts traffic around a town.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes that is used for commercial traffic.
U.S. Geological Survey
A route that substitutes for a major United States-numbered highway or one of the most important State-numbered routes, and that is used for commercial traffic.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes that diverts traffic around a town.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes that goes through a tunnel.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes that goes through a tunnel, and where a travel fee is collected.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes where a travel fee is collected.
U.S. Geological Survey
A major United States-numbered highway or one of the most important State-numbered routes that is designated for truck traffic.
U.S. Geological Survey
The name of the road
U.S. Geological Survey
The 2-digit Federal Information Processing Standard (FIPS) code used by the U.S. Bureau of the Census, for the State or State equivalent in which the road is located.
U.S. Geological Survey
Length of feature in internal units.
ESRI
1500 Research Parkway, Suite B223
None
Data can be downloaded from www.geostac.org with a registered user ID and password provided by the Spatial Sciences Laboratory.
Not Applicable
897-B Harrison Street, S.E.