Digital Line Graph files are a format standard used by USGS for converting and exchanging datafiles.
Digital Line Graph. This format was initially developed by the U.S. Geological Survey (USGS) as part of the U.S. National Mapping Program Digital Cartographic Data Standards. It was, and is, used to distribute USGS digital maps. This format is file based in structure. An enhanced version of DLG (DLG-E) is currently being developed.
Digital Line Graph. two major U.S. Geological Survey (USGS) digital data file structures. DLG is line map information in digital form. These files include information on planimetric base categories, such as transportation, hydrography, and boundaries. DEM files consist of a sample array of elevations for a number of ground positions that are at regular spaced intervals.
Digital Line Graph, a digital format used by the USGS for vector data
Digital Line Graph. A commonly used format and standards for transferring vector data developed and published by the USGS.
Digital Line Graph file format. Used by the US Geological Survey to store geographical data.
Digital Line Graph ( glossary)
Digital Line Graphs. Standard line vector product of the USGS. Includes such themes as roads, rivers, railroads, etc.
Digital line graph. In reference to data, the geographic and tabular data files obtained from the USGS for exchange of cartographic and associated tabular data files. Many non-DLG data may be formatted in DLG format.6 In reference to data, the formal standards developed and published by the USGS for exchange of cartographic and associated tabular data files. Many non-DLG data may be formatted in DLG format.6
igital ine raph A format used by the U. S. Geological Survey to prepare a digital vector version of a topographic map. DLGs at a scale of 1:2,000,000 and 1:100,000 can be downloaded from the USGS. MORE
Digital Line graph - A common format for transferring vector data from one GIS package to another.
Digital Line Graph - A USGS format, with several variations, for descriptions of individual data types such as transportation ( e.g., roads), hydrography (streams, lake shores), and contours.
Digital Line Graph. USGS product that includes digital information from the USGS map base categories, such as transportation, hydrography, contours, and public land survey boundaries.
Digital Line Graph. A computer file format for mapping data that provides a topological structure to describe points, lines and polygons. A DLG may contain lists of point coordinates describing boundaries, drainage lines, and other linear or area features, which are organized by USGS quadrangle areas. These data are the digital equivalent of the linear hydrographic and cultural data on a topographic base map. The flood risk thematic layers developed by FEMA will fit the quadrangle as an overlay. The U.S. Geological Survey Digital Line Graph Level 3 Optional format has been adopted by FEMA for the purposes of the National Flood Insurance Program mapping and engineer requirements. Level 3 data files are fully topologically structured and are designed to be integrated into GISs.
A Digital Line Graph is line map information in digital form. The DLG data files include information about planimetric base categories such as transportation, hydrography and boundaries.
Digital Line Graph. A comprehensive topological vector format data structure developed by the U.S. Geological Survey. Often referred to as DLG, DLG-3, or DLG Optional format. Used for storing and distributing digital data.
Digital Line Graph. 1. 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. 2. In reference to data format, the formal standards developed and published by the USGS for exchange of cartographic and associated tabular data files. Many non-DLG data may be formatted in DLG format.
digital line graph. A file or data structure from the US Geological Survey (USGS) that includes digital non-topographic information from the USGS map base categories such as transportation, hydrology, and public land survey boundaries.
Digital Line Graph. U. S. Geological Survey digital map format used to distribute topographical maps in vector form.
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.
1. Digital Line Graph files from the U.S. Geological Survey (USGS), including data from the basemap categories such as transportation, hydrography, contours, and public land survey boundaries. 2. The digital format standards published by USGS for exchanging cartographic data files and in which the USGS delivers Digital Line Graph data sets.