The U.S. Geological Survey's (USGS) digital line graph (DLG) files are digital vector representations of cartographic information. Data files of topographic and planimetric map features are derived from either aerial photographs or from cartographic source materials using manual and automated digitizing methods. PLEASE NOTE- DLGs are “rough” representations of USGS maps, and is inferior in quality to DDS’ USGS QUADRANGLE MAP CONVERSIONS product. DLGs are currently being produced for the US, so coverage is limited to area/feature.

Large Scale 
The large-scale DLG data primarily are derived from USGS 7.5-minute topographic quadrangle maps at 1:24,000 and 1:25,000 scales (1:25,000 and 1:63,360 scales for Alaska). 

Intermediate Scale 
Intermediate or 100,000-scale DLG data are derived from USGS 1:100,000-scale, 30- by 60-minute quadrangle maps. If these maps are not available, Bureau of Land Management (BLM) planimetric maps at a scale of 1:100,000 are used. 

Small Scale 
Small or 1:2,000,000-scale DLG data are organized two ways (by section or by State) and contain information on planimetric base categories, including transportation, hydrography, and boundaries for all 50 States. The Section DLG data files are historical files dating between 1973 and 1980 that are organized by sections of the United States (e.g., northeastern States). The State data files are recent files dating between 1990 and 1994 that are organized by State.

If you need help locating a USGS quad map name, try our FREE USGS MapFinder utility.

USGS DLG Fact Sheet (284 Kb)

Formats

• Individual Maps: $40 initial set-up fee and add $15.00 per feature. 

1:100k (Click here to view bundles)

• $50-$150 per state.

Placing Orders

To expedite your order please call or email your request.  If you do not know the map names, we can provide assistance identifying the coverage area you need.  Data bundles can be ordered online.  To order online, click here.

Digital Data Services, Inc.
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