What kinds of data are contained in the USGS DLG files?

USGS File Types DIGITAL LINE GRAPH (DLG) are vector files generated on traditional paper topographic maps. For example, this includes township & ranges, contour lines, rivers, lakes, roads, railroads and towns.

What is contained in a digital line graph?

Digital line graph (DLG) data are digital representations of cartographic information. DLG? s of map features are digital vectors converted from maps and related sources. The U.S. Geological Survey (USGS) DLG data are classified as large, intermediate, and small scale.

What are DLGs?

Digital Line Graphs (DLGs) are vector representations of most of the features and attributes shown on USGS topographic maps. Large-scale DLGs are produced in tiles that correspond to the 7.5-minute topographic quadrangles from which they were derived.

How do you make a digital line graph?

How to create a line graph

Enter the title, horizontal axis and vertical axis labels of the graph.
Enter data label names or values or range.
Set number of lines.
For each line, enter data values with space delimiter, label and color.
Check curved line if needed.
Press the Draw button to generate the line graph.

What is digital raster graphics in GIS?

A digital raster graphic (DRG) is a digital image resulting from scanning a paper USGS topographic map for use on a computer. The map file is UTM projected and georeferenced to the surface of the earth. DRG’s are regularly used in GIS applications.

Who produces digital line graphs?

the U.S. Geological Survey (USGS)
A Digital Line Graph (DLG) is a cartographic map feature represented in digital vector form that is distributed by the U.S. Geological Survey (USGS). DLGs are collected from USGS maps and are distributed in large-, intermediate- and small-scale with up to nine different categories of features, depending on the scale.

What is a DRG in GIS?

GIS Dictionary. DRG. [data models] Acronym for digital raster graphic. A raster image of a scanned USGS standard series topographic map, usually including the original border information, referred to as the map collar, map surround, or marginalia.

What kinds of data are contained in the USGS DLG files? USGS File Types DIGITAL LINE GRAPH (DLG) are vector files generated on traditional paper topographic maps. For example, this includes township & ranges, contour lines, rivers, lakes, roads, railroads and towns. What is contained in a digital line graph? Digital line graph (DLG) data…