USGS EROS Archive - Digital Line Graphs (DLGs) - Large Scale

Science Center Objects

Digital Line Graphs (DLGs) are digital vector representations of cartographic information derived from USGS maps and related sources.

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Large-Scale (7.5-minute) DLGs correspond to the USGS 1:20,000-, 1:24,000-, and 1:25,000-scale topographic quadrangle maps. They are primarily cast to the Universal Transverse Mercator (UTM) projection system, but some are cast to the State Plane coordinate system. They are referenced to either the North American Datum (NAD) of 1927 (NAD27) or the NAD of 1983 (NAD83).

Digital Line Graph (DLG) - Large Scale (7.5min) - Grove Quad - OK

Digital Line Graph (DLG) - Large Scale
(7.5 min) - Hydrography and
Tranportation layers - Grove Quad -
(Public domain)

Depending on scale, the following layers (or categories of feature type) are available:

Layer Feature Type
Public Land Survey System (PLSS) Township, range, and section lines
Boundaries (BD) State, county, city, and other national and State lands such as forests and parks
Transportation (TR) Roads and trails, railroads, pipelines, and transmission lines
Hydrography (HY) Flowing water, standing water, and wetlands
Hypsography (HP) Contours and supplementary spot elevations
Non-vegetative features (NV) Glacial moraine, lava, sand, and gravel
Survey control and markers (SM) Horizontal and vertical monuments (third order or better)
Man-made features (MS) Cultural features, such as buildings, not collected in other data categories
Vegetative surface cover (SC) Woods, scrub, orchards, and vineyards

Coverage Maps

Coverage Maps indicating the availability of Digital Line Graphs Large-Scale products are available for download.

Additional Information

Access Data

EarthExplorer can be used to search, preview, and, download Digital Line Graph (DLG) data. The collection is located under the Digital Line Graphs category.



Digital Line Graphs (DLGs) - Large Scale Digital Object Identifier (DOI) number: /10.5066/P9LVXWFR