Search Help
Large-scale digital line graph data from the U.S. Geological Survey

Abstract: Digital line graph (DLG) data are digital representations of cartographic information. DLGs of map features are converted to digital form from maps and related sources. Large-scale DLG data are derived from USGS 1:20,000-, 1: 24,000-, and 1: 25,000-scale 7.5-minute topographic quadrangle maps and are available in nine categories: (1) hypsography, (2) hydrography, (3)vegetative surface cover, (4) non-vegetative features, (5) boundaries, (6)survey control and markers, (7) transportation, (8) manmade features, and (9)Public Land Survey System. All DLG data distributed by the USGS are DLG - Level 3 (DLG-3), which means the data contain a full range of attribute codes, have full topological structuring, and have passed certain quality-control checks.

Purpose: DLGs depict information about geographic features on or near the surface of the Earth, terrain, and political and administrative units. These data were collected as part of the National Mapping Program.
Related URL
Description: Query and order satellite images, aerial photographs, and cartographic products through the U.S. Geological Survey. Log in as a guest or as a registered user. Registered users have access to more features than guests do. If you plan on using EarthExplorer frequently, you may wish to register. Please note that this site uses Session Cookies and Java applets.
Geographic Coverage
Spatial coordinates   
  N: 49.0   S: 24.0   E: -66.0   W: -126.0

Data Set Citation
Dataset Originator/Creator: U.S. Geological Survey EROS Center
Dataset Title: DLG Large
Dataset Release Date: 1981-01-01T00:00:00.000Z
Dataset Release Place: Sioux Falls, SD 57198 USA
Dataset Publisher: U.S. Geological Survey
Version: Not provided
Online Resource:
Temporal Coverage
Start Date: 1970-01-01
Use Constraints There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to for the USGS disclaimer.
Data Set Progress
Data Center
Earth Resources Observation and Science Center, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 605-594-6151, 800-252-4547
Fax: 605-594-6589
Email: lta at
Contact Address:
LTA Customer Services
U.S. Geological Survey
EROS Center
47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Country: USA
Distribution Media: Digital Download
Fees: None
Phone: 605-594-6151
Fax: 605-594-6953
Email: lta at
Contact Address:
Long Term Archive
U.S. Geological Survey
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Country: USA
View entire list
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2001-06-28
Last DIF Revision Date: 2019-03-25