DLG
[data models] Acronym for digital line graph. Data files containing vector representations of cartographic information derived from USGS maps and related sources.
DLG Files, Digital Elevation Data, NWI Data and Land Use/Land Cover Data
National Cartographic Information Center
U.S. Geological Survey
507 National Center
Reston, VA 22092
(703) 860-6045 ...
DLG Data - DLG-O data are derived from standard USGS topographic quadrangles.
DLG
Digital Line Graph. The digital format standards published by US Geological Survey for exchanging cartographic data files and in which the USGS delivers topographical maps in vector format (Walker 1993).
DLG : Digital Line Graph files from the U.S. Geological Survey
DXF: Data Exchange Format. A format for storing vector data in ASCII or binary files; used by AutoCad or other CAD software and convertible to ARC/INFO coverages.
DLG stands for digital line graph, a form of digital map developed by the United States Geological Survey. DLGs supply users with the digital version of information printed on USGS topographical quadrangle maps.
DLG - See Digital Line Graph.
DOB - New York State Division of the Budget
DOQ - See Digital Orthophoto Quarter-quad.
DLG (Digital Line Graph) - (1) A digital data format used by the USGS for large scale digital topographic maps. (2) A digital data file standard published by the USGS for exchanging digital cartographic data files.
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DEM/DLG
What is needed is cleaner land-use data separate from elevation contours. One convenient source of this type of data is the USGS Digital Line Graphics (DLG) data base.
Created from DLG that have vertically integrated with all categories of hypsography, hydrography, ridge line, break line, drain files, and all vertical and horizontal control network ...
The USGS uses DLG's and DEM's to make up quad sheets.(MAPS) DLG's are digital Line Graphs that are vector based maps used to represent roads and streams.
Figure 1b. USGS DLG of rivers.
Figure 1c. USGS DLG of contour lines (hypsography).
Figure 1d. USGS digital elevation (DEM).
SDTS Vector data (DLG)
SDTS is also used to distribute vector data. ArcToolbox has a routine that does a limited import of the vector data (full attribute information is not imported).
Note the limited number of attributes: ...
Digital Line Graph (DLG)
In reference to data, the geographic and tabular data files obtained from the USGS that may include base catagories such as transportation, hydrography, conours, and public land survey boundaries.
Digital Line Graph (DLG) p. 82 a data format developed by US Geological Survey National Mapping Division that uses a topological vector model. digitizer p.
ArcInfo supports data conversion from many geographic data formats such as DLG, TIGER, DXF, and DEM. data dictionary A catalog of all data held in a database, or a list of items giving data names and structures.
For example, the DLG-3 feature schema is needed to support both data discovery and access; yet it is too large to transfer between catalog servers, clients and data access servers to support these functions.
STATSGO data are available in the USGS Digital Line Graph (DLG-3) optional distribution format.
La Division des levés géodésiques (DLG), en collaboration avec la Commission géologique du Canada (CGC), exploite actuellement un vaste réseau espacé de stations de poursuite de satellites GPS, appelées points de contrõle actif (CACS); ...
Digital Line Graph (DLG)
The digital format standards published by USGS for exchange of cartographic data files and for which Digital Line Graph data sets are delivered by USGS. Digital Line Graph files from the U.S. Geological Survey.
this type of data from USGS topographic maps is becoming available in digital form as DLG (digital line graph) files
elevation data is available from the USGS in the form of DEMs, (digital elevation models) at various resolutions ...
A set of related information that a computer can access by a unique name (e.g., a text file, a data file, a DLG file). Files are the logical units managed on disk by the computer's operating system. Files may be stored on tapes or disks.
format ...
- Vector: ASCII, ARC/INFO ungenerate, ARC/INFO E00, ArcView SHAPE (with topology correction), BIL, DLG (U.S.), DXF, DXF3D, GMT, GPS-ASCII, USGS-DEM, IDRISI, MOSS, MapInfo MIF, TIGER, VRML
- point data (called sites) ...
The most recent addition to these free products is GeoMatica™ FreeView from PCI Geomatics This free geomatics software package will allow users to quickly and easily view data directly in a number of common data formats including E00, MIF, DEM, DLG, ...
 See also: GIS, Information, Digital, Mapping, Image
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